小学生说明文作文400字_[第四单元]写一篇说明文
2020-05-12 00:00
在平时的学习、工作或生活中，说到作文，大家肯定都不陌生吧，借助作文人们可以反映客观事物、表达思想感情、传递知识信息。还是对作文一筹莫展吗？下面是小编精心整理的小学生说明文作文400字7篇，欢迎阅读与收藏。
In the usual study, work, or life, when it comes to composition , everyone must be no stranger. With the help of components, people can reflect objective things, express ideological feelings, and convey knowledge information.Or is it unprepared to composition?Below is the elaborate elementary school student explanation of the text of the composition of 400 words. Welcome to read and collect.
小学生说明文作文400字 篇1
在我们的生活中处处都有科学，运用科学会使我们获得成功，一旦违背科学就会受到挫折。而我就有这么一次经历。
There are science everywhere in our lives, and the use of science will make us success. Once we violate science, we will be frustrated.And I have such an experience.
我三年级的时候喜欢捉一些小昆虫来玩，认为这是一件很有趣的事。有一次下雨后，我照常来到楼下的花坛边捉蜗牛。蜗牛是一种很奇特的动物，它整天都躲在螺旋状的壳里，等下过雨后才会出来，它有着一对能够自由伸缩的触角，触角下面有着两个突出来的线状的东西，我猜那是它的眼睛。蜗牛爬行的时候会分泌一种黏糊糊的液体，用来标记自己走过的路。我很快就捉到了一只蜗牛。我看着它在瓶子里慢慢地爬来爬去，忽然冒出了一个想法：能不能把蜗牛和它的壳分离呢？我准备试验一下。
When I was in my third grade, I liked to catch some small insects to play, thinking that this was a very interesting thing.After the rain, I came to the flower bed downstairs to catch snails.The snail is a very strange animal. It hides in the spiral shell all day. It will only come out after the rain. It has a pair of tentacles that can be free to tease.Things, I guess it is its eyes.When the snail crawls, a sticky liquid is secreted to mark the way it goes through.I quickly caught a snail.I watched it slowly crawling around in the bottle, and suddenly a idea came up: Can you separate the snail from its shell?I'm ready to test.
我找来了一根小棍，轻轻地在蜗牛的壳上敲了几下，蜗牛马上就缩回了壳里，再也不出来了。我便加大了力度，由“敲”改为了“刺”。我用小棍在蜗牛壳上一顿乱刺，蜗牛壳很快就变成了一地碎片，露出了蜗牛那黏糊糊的身体。我用棍子小心地挑开碎壳，蜗牛已经变成了一滩液体，还有触角。我用棍子碰了它几下，蜗牛慢慢地往前爬行了一小段距离，很快就死了。
I found a small stick and knocked a few times on the snail's shell, and the snail immediately retracted into the shell, and she couldn't come out again.I increased their strength and changed from "knock" to "thorn".I used a small stick to stab on the snail shell, and the snail shell quickly became a piece of fragments, revealing the slimy body of the snail.I carefully picked the broken shell with a stick, and the snail had become a pool of liquid and tentacles.I touched it a few times with a stick, and the snail slowly crawled forward for a short distance, and soon died.
我非常疑惑：我不是减轻了它的负担吗？它怎么一动不动了？我回家翻了《十万个为什么》，终于明白了：蜗牛的壳是蜗牛身体中不可分离的一部分，一旦分离，蜗牛就会死掉。也明白了：任何生物都有生存的权力，我们不能人为地伤害它们。
I am very puzzled: Didn't I reduce its burden?Why can't it move?I went home and flipped through "100,000 Bras", and finally understood that the shell of the snail is an inseparable part of the snail's body. Once the separation is separated, the snail will die.I also understand: Any creature has the power to survive, and we cannot artificially hurt them.
小学生说明文作文400字 篇2
我有一个小巧玲珑、图案精美的文具盒。这是去年我期末考试时，因为英语、数学成绩都是满分，爷爷特意送给我的奖品。它伴随我学习已经一年多了，我挺喜欢它的。
I have a small and exquisite stationery box.This is the exam at the end of last year. Because English and mathematics scores are full, Grandpa specially gives me a prize.It has been with me for more than a year, and I like it very much.
文具盒是淡绿色的，有二十多厘米长，八厘米宽，上面印着两只小熊图案。它的身体胖乎乎、圆滚滚的，头部和身体都是白色的，只有眼圈、耳朵和肩部是黑褐色的。特别是那对黑黑的眼圈，长在白白的脸上，像是戴着副墨镜，可逗人了。它那东张西望的神情，更是讨人喜欢。
The stationery box is pale green, with more than 20 centimeters long and eight centimeters wide, with two bear patterns printed on it.Its body is fat and round, and its head and body are white, only the eye circles, ears, and shoulders are dark brown.Especially the pair of black eyes, growing on the white face, like wearing a pair of sunglasses, it is funny.Its look of the west is even more flattering.
文具盒不仅外表美丽可爱，而且居住在里面的成员也不少：有活泼可爱的橡皮，有性格爽直的钢笔，有沉默寡言的直尺，有锋利无比的小刀，还有散发香水味的铅笔。虽然成员性格不同，但它们和睦相处、亲如兄弟。
The stationery box is not only beautiful and cute in appearance, but also many members living inside: there are lively and cute rubber, a straightforward pen, a sluggish straight ruler, a sharp knife, and a pencil with perfume flavor.Although the members have different personalities, they live in harmony and are as pro -brothers.
每当我做作业的时候，打开文具盒，它们就按照自己的功能跳出来为我服务，让我把字写得整整齐齐，老师经常给我打上个“优”字，并时常表扬我;每当我写错字的时候，橡皮就从文具盒里蹦出来，让我把错字擦得干干净净。可看到它那愁眉苦脸的样子，好像对我说：“小主人呀小主人，你可不能光粗心大意呀，你用我一次，我的身躯就减短一些，你以后一定要细心呀!”我虽然得了100分，又受到了表扬，可我非常惭愧。
Whenever I do homework, open the stationery box, they jump out of my own function to serve me, let me write the words neatly, the teacher often calls me the word "excellent" and often praise me;Whenever I write the wrong words, the rubber jumped out of the stationery box, allowing me to dry the wrong words.But seeing its frowning face seemed to say to me, "Little owner, little owner, you can't be careless, you use me once, my body will be shortened, you must be careful in the future!"Although I scored 100 points and was praised, I was very ashamed.
我心爱的文具盒，希望你伴随我在知识的海洋中遨游，度过整个美好的学生生活。
My beloved stationery box, I hope you travel with me in the ocean of knowledge to spend the whole beautiful student life.
小学生说明文作文400字 篇3
山西，顾名思义，意为大山之西，即地处太行山之西。山西古称河东，意为大河之东，即地处黄河之东。
Shanxi, as the name suggests, means the west of the mountains, that is, the west of Taihang Mountain.The ancient Shanxi was called the East of Hedong, which means the east of the Great River, that is, the east of the Yellow River.
山西简称晋，是因为西周、春秋时期为晋国之地。春秋末年，韩，赵，魏三家卿大夫把晋国一分为三，所以历史又把韩赵魏三个诸侯国并称为“三晋”。这就是我的家乡山西这一名称的由来。
Shanxi is referred to as Jin for short because the Western Zhou Dynasty and the Spring and Autumn Period were the place of Jin.In the end of the spring and autumn, Dr. Han, Zhao, and Wei Sanjia divided the Jin Dynasty into three, so history also referred to the three vassal states of Han Zhao and Wei as "San Jin".This is the origin of my hometown of Shanxi.
我们的家乡位于内蒙古自治区、陕西省、河北省、河南省之间。南北两端长约682千米，东西两端宽约385千米。土地总面积为15.6579万平方千米，约占全国土地总面积的1.63％，在全国34个省级行政区划中居于第19位。
Our hometown is located between Inner Mongolia Autonomous Region, Shaanxi Province, Hebei Province, and Henan Province.The north and south ends are about 682 kilometers long, and the ends of the east and west are about 385 kilometers wide.The total land area was 15.65.79 million square kilometers, accounting for about 1.63 % of the total land area of the country, ranking 19th in 34 provincial administrative regions across the country.
山西省现行行政区包括太原、大同、阳泉、长治、朔州、晋城、晋中、忻州、临汾、运城和吕梁11个省辖市，共119个区、市、县，省会设在太原。
The current administrative divisions of Shanxi Province include Taiyuan, Datong, Yangquan, Changzhi, Shuozhou, Jincheng, Jincheng, Xinzhou, Linfen, Yuncheng, and Luliang. A total of 119 districts, cities, and counties.
坚持以人为本，促进人与自然的和谐共处，实现人的全面发展，已经成为全世界的共识。目前，山西人口的增长已经基本得到控制。近年来，随着科教兴晋战略的实施，山西人口的文化素质得到迅速提高。山西人口的分布特点与人口的不断迁徙有着极为密切的关系。改革开放后，山西的人口流动日趋活跃。山西很久以前就是一个多民族分散杂居的地区。其中汉族人口最多，在少数民族中，以回族居多。
Adhering to people -oriented, promoting the harmonious coexistence of man and nature, and realizing the comprehensive development of people has become the consensus of the world.At present, the growth of Shanxi's population has been basically controlled.In recent years, with the implementation of the promotion of science and education, the cultural quality of Shanxi population has been rapidly improved.The distribution characteristics of the population of Shanxi have a close relationship with the continuous migration of the population.After the reform and opening up, the population flow in Shanxi became increasingly active.Shanxi a long time ago was a regional distraction of many ethnic groups.Among them, the Han nationality has the most population, and most of the Hui ethnic minorities.
这就是我的家乡山西，现在听了我的介绍后你应该对它有所了解了吧！
This is my hometown of Shanxi. Now after listening to my introduction, you should know it!
小学生说明文作文400字 篇4
番茄是五彩缤纷的蔬菜王国里的一位公民。它的营养丰富，据说在蔬菜维生素排行榜上，位居前列。
Tomato is a citizen in the colorful vegetable kingdom.It is rich in nutrition and is said to be at the forefront on the Vitamin Ranking.
番茄是一种草本植物，有半米来高。它的枝干柔弱，长着软毛。叶子是齿状的，挨挨挤挤，显得十分茂盛，最好看的`是番茄花了。那黄色的小花有五片花瓣，三五成群地长成一簇，像是几只小蝴蝶聚在一起说悄悄话。
Tomato is a herbaceous plant with half a meter high.Its branches are weak and have soft hair.The leaves are tooth -like, and they are squeezed and look very lush. The best look is tomato flower.The yellow flower has five petals, and three or five grows into a cluster, like a few small butterflies gathered together.
花谢以后，颈上结满了青色的小番茄。慢慢地，番茄长大了，变得结实饱满，圆滚滚的。它好像一位爱美的姑娘，先是披上了一身充满青春活力的绿风衣，接着换上了一件黄色的连衣裙，最后穿上了一件红色的皮衣。这时候，番茄成熟了。你看，它长的鲜艳，红得发亮，像搽过油一样。远远看去，像一个个红灯笼，又像一张红扑扑的脸。
After the flowers, the neck was covered with a small cyan tomato.Slowly, the tomato grew up and became strong and full.It seemed like a beautiful girl, first put on a green trench coat full of youthful vitality, then put on a yellow dress, and finally put on a red leather coat.At this time, tomatoes are mature.You see, it is bright and bright, as bright as it is.From a distance, like a red lantern, like a red face.
番茄的吃法有很多种。我最喜欢生吃了。把番茄轻轻切开，就会看见那红嫩的肉和黄色的小籽，在上面撒了一些白糖，吸一口鲜红的汁水，凉丝丝的。再把半个番茄放在嘴里一咬，酸酸甜甜，味道好极了。有人说，番茄成熟后再吃更是美味可口。不论是番茄炒鸡蛋、番茄沙拉、番茄煮汤……都是一道道营养丰富的美味佳肴。番茄还可以制成美味的番茄酱。如果你去麦当劳，用那番茄酱蘸薯条吃，一定会让你回味无穷。
There are many ways to eat tomatoes.I like to eat raw the most.Cut the tomato gently, you will see the red and tender meat and small yellow seeds, sprinkle some sugar on it, take a bite of bright red juice, and cool.Put half of the tomato in your mouth and bite it. It is sweet and sour and tastes great.Some people say that eating tomatoes is delicious and delicious after eating.Whether it is tomato fried eggs, tomato salad, tomato soup ... it is a delicious delicious dish.Tomatoes can also be made into delicious tomato sauce.If you go to McDonald's and eat with that tomato sauce dipped in potato, it will definitely make you memorable.
番茄真是全身都是宝。
Tomato is really a treasure.
小学生说明文作文400字 篇5
褒河位于勉县与汉中的交界处，那里风景优美、景色宜人，是夏季休闲避暑的好地方。
The River is located at the junction of Mian County and Hanzhong. The beautiful scenery and pleasant scenery are a good place for summer leisure and summer.
来到褒河，从南门进入，首先映入眼帘的是一排整齐的红色仿古房子，稍一抬头就看见前面有三个高大的石头巨人，大约有十五米高，分别是刘备、关羽、张飞三人。石像旁边有一棵桃树。树上开满了粉色的花，他们三人在这里拜天地结为兄弟，这就是著名的“桃园三结义”。
When you come to the river and enter from the south gate, the first row of red antique houses are reflected in the eyes. When you look up, you can see that there are three tall stone giants in front of them, about fifteen meters high, namely Liu Bei, Guan Yu, and Guan Yu, and Guan Yu, and Guan Yu, and Guan Yu, and Guan Yu, and Guan Yu, and Guan Yu, and Guan Yu, and Guan Yu, and Guan Yu, and Guan Yu, and Guan Yu, and Guan Yu, and Guan Yu, and Guan Yu, and Guan Yu, and Guan Yu, and Guan Yu, and Guan Yu, and Guan Yu, and Guan Yu, and Guan Yu, and Guan Yu, and Guan Yu, and Guan Yu, and Guan Yu, and Guan Yu, and Guan Yu, and Guan Yu, and Guan Yu, and Guan Yu, and Guan Yu, and Guan Yu, and Guan Yu, and Guan Yu, and Guan Yu, and Guan Yu, and Guan Yu, and Guan Yu, and Guan Yu, and Guan Yu, and Guan Yu, and Guan Yu.Zhang Fei three.There is a peach tree next to the stone statue.The tree was full of pink flowers. The three of them worshiped the heavens and the earth as brothers. This is the famous "Taoyuan Three Jieyi".
再往前走就来到有名的“情人桥”，它横跨在河面上，是一座铁索吊桥。桥身是一根根铁索连成的，桥面是用一块块木板铺成的，大约有八十米宽三十米长，只容得下两人并排通过，走在上面有摇摇晃晃的感觉。桥两边铁索上挂满了情人锁，据听人说有情人只要从桥上通过就能终成眷属。
Go forward and come to the famous "Lover Bridge". It spans the river and is an iron cable suspension bridge.The bridge body is made of iron cable. The bridge surface is paved with wooden boards, about eighty meters wide 30 meters long.Feel.The iron cable on both sides of the bridge is covered with lover locks. According to the hearing, there are lover who can eventually become dependents as long as they pass from the bridge.
继续向前走，就看见石头刻成的鼠、牛、虎、兔、龙、蛇、马、羊、猴、鸡、狗、猪、等十二生肖雕塑，雕刻工艺精湛，活灵活现。每个雕塑下面都用红色的字写着这个属相的个性特点。
If you continue to move forward, you can see the mouse, cattle, tigers, rabbits, dragons, snakes, horses, horses, sheeps, monkeys, chickens, dogs, pigs, and other zodiac sculptures engraved.Under each sculpture, red characters are written in red words.
一直往前走就爬上了褒河大坝，站在大坝，站在大坝上，一阵阵清凉的河风吹来，凉爽极了！沿着褒河大坝西边向北是着名的褒河栈道。木头铺成的栈道有一公里长，每隔二三百米远就有一个凉亭，人们可以在那里休息，欣赏风景，呼吸清新的空气。
I walked forward and climbed up to the dam of the river, standing on the dam, standing on the dam, and a cool river wind blowing, cool!The north of the west side of the dam of the river is the famous Peace River boardwalk.The boardwalk made of wood is one kilometer long, and there is a gazebo every two or three hundred meters away. People can rest, enjoy the scenery, and breathe fresh air.
褒河景色宜人，历史悠久，真是一个旅游观光、休闲避暑的好地方！
The scenery of the river is pleasant and has a long history. It is really a good place for tourism, leisure and summer!
小学生说明文作文400字 篇6
大家知道我家经常买什么花吗？那就是百合花。
Do you know what flowers I often buy?That is lily flower.
百合花生长在中国、日本、美洲和欧洲等温带地区，它色彩鲜艳，有白、红、黄、粉、等各种鲜艳的颜色。
Lily grows in temperate regions such as China, Japan, the Americas, and Europe. It has bright colors, with various bright colors such as white, red, yellow, pink, and other bright colors.
百合花姿态雅致，叶片青翠娟秀，她的花瓣上有一颗一颗的“小红豆”，花中间是雌花蕊和雄花蕊，雌花蕊有6根，雄花蕊只有1根，花瓣共有6片。它的叶子与众不同，许多花的叶子的茎都像鱼骨头一样在叶片上铺开，而百合花的茎就像五根手指笔直地向叶尖伸去，漂亮吗？
The lily flower posture is elegant, and the leaves are green and beautiful. Her petals have "little red beans" on the petals. The middle of the flower is pistils and male stamens. There are 6 pistils, only 1 male stamen, and 6 pieces of petals.Its leaves are different. The stems of many flowers are spreading on the leaves like fish bones, and the stems of lily flowers are like five fingers stretching towards the tip of the leaves. Is it beautiful?
百合花具有较高的营养成分又具有较高的医药用价值，早在20xx年前，百合花就被中医引用。
Lily flower has high nutritional components and high medical value. As early as 20xx, lily flower was cited by Chinese medicine.
关于百合花还要一个美丽的传说，在一个遥远的峡谷里，一颗百合花的种子落在了野草丛中，并在那里发芽生长。百合花在没有开花之前和野草是没有什么区别的，于是其它的野草都认为她是其中的一员，只有百合花知道自己是一朵花，一朵不同于其它野花的花，所以当百合花开出一个花蕾的时候，其它的野草都嘲笑她，孤立她，认为她是野草的异类，但依然不认为她是一朵花。百合花默默地承受着，因为她相信总有一天自己会开出一朵漂亮的百合花。终于，百合花迎来了她生命中最重要的一刻，怒放在野草丛中的时候，她证明了自己的价值，证明了自己的意义。在刚刚盛开的百合花瓣中，沾满了晶莹的露珠，当其它野草都以为这是早晨的水雾时，只有百合花知道那是自己喜悦的泪水。
There is also a beautiful legend about lily flower. In a distant canyon, a lily flower seeds fall in the weeds and germinate there.There is no difference between lily flowers before flowering and weeds, so other weeds think she is one of them. Only lily knows that she is a flower, a flower different from other wild flowers, so when a lily flower, it is a lily flower.When a flower bud was opened, the other weeds laughed at her, wasolate her, thinking that she was a heterogeneous species, but still did not think she was a flower.Lily flower was silent, because she believed that one day she would bloom a beautiful lily flower.Finally, Lily Hua ushered in the most important moment in her life. When she was blooming in the grass, she proved her value and proved her meaning.Among the just blooming lily petals, it was covered with crystal dew. When other weeds thought it was the morning water mist, only lily knew that it was tears of my joy.
我喜欢百合花，更喜欢百合花的善良和勇敢！
I like lily flowers, and I prefer the kindness and bravery of lily flower!
小学生说明文作文400字 篇7
科技无处不在，科技使我们感到无比自豪，我们的衣食住行一刻也离不开科技的贡献。
Technology is ubiquitous, and technology makes us very proud of it. Our clothing, food, housing and transportation are inseparable from the contribution of science and technology for a moment.
20世纪的发明与创造给人类带来了无穷的变化。拉链：天衣无缝；洗衣机：解放劳动力；维生素：让生命之树长青；电饭煲：生米煮成熟饭；空调：这里四季如春；磁县浮列车：会“飞”的列车；霓虹灯：不夜的明珠……
The invention and creation of the 20th century brought endless changes to humans.Zipper: seamlessly; washing machine: liberating labor; vitamin: let the tree of life grow green; rice cooker: raw rice to cook mature rice; air conditioning: here in the four seasons like spring; magnetic county floating train: flying "flying" train; neon light: no night: not nightPearl ...
啊！现在的科技真发达呢！就连我们的学校也存在着无穷无尽的科技。
what!The current technology is really developed!Even our school has endless technology.
在一节课科学课上，王老师给我们上了一课关于“电和磁”的课文。王老师告诉我们：“在生活中的电能是源于1820年，丹麦科学家奥斯特在一次实验中，偶然让通电的导线靠近指南针，发现了电能产生磁，由于这个发现，为人类大规模利用电能打开了大门。”在接下来的时间里，我们又做了一个实验。我们先准备一个指南针，一个电池，一根导线，然后拉直导线，在导线的两端分别去掉塑料露出铜芯，接着把导线两端的铜芯接在电池的正负级上。紧接着我们将导线靠近小指南针，就在这时我们观察到导线刚接近指南针时，指南针突然转个不停，断开电流后，指南针又像刚刚被教训后的孩子一样安静下来。老师告诉我们这是电能产生磁的证据。那时我们一同见证到了科技的奥秘和有趣。
In a class science, Teacher Wang gave us a lesson about "electricity and magnetic".Teacher Wang told us: "The power in life is derived from 1820. In a experiment, the Danish scientist Aston accidentally allowed the power -powered wire to close the compass and found that the electricity was magnetic.Electric energy opened the door. "In the next time, we did another experiment.Let's prepare a compass, a battery, a wire, and then pull the wires, remove the plastic to expose the copper core at both ends of the wire, and then connect the copper core at both ends of the wire to the positive and negative level of the battery.Immediately, we closer the wire closer to the small compass. At this moment we observed that when the wire was approaching the compass, the compass suddenly turned around. After disconnecting the current, the compass was as quiet as the child who had just been taught.The teacher told us that this was evidence of magnetic energy.At that time, we witnessed the mystery and interesting of science and technology.
科技支撑着文明，科技创造了未来，而未来在我们的手中，让我们成为知识的探索者，让我们在未知的道路上漫游，让我们用无穷的创造力将我们居住的世界变得更美丽！
Science and technology supports civilization, technology has created the future, and the future is in our hands, let us become the explorer of knowledge, let us roam on the unknown road, let us use endless creativity to make the world we live in more beautifulIntersection
[Primary school student description of the composition 400 words collection 7 articles] Related articles: