無論是在學校還是在社會中，許多人都寫過作文吧，藉助作文可以宣洩心中的情感，調節自己的心情。寫起作文來就毫無頭緒？下面是小編收集整理的英語作文400字7篇，歡迎大家分享。
英語作文400字 篇1
如果我們分析海水的鹽度，會發現地區間只有輕微的變化，然而有些小的變化是重要的。 導致海洋的鹽度變化的基本過程有三個。
其中之一是通過蒸發的方式即把液態水轉化為水蒸氣來減少海洋中的水分。這樣由於鹽留了下來，所以鹽度增大。
當然，如果這種方式走向極端，將會餘下白色的鹽晶體。 與蒸發相反的是降水，如降雨，由此水被加入海中，海水被稀釋，從而鹽度降低。 這種情形會發生在大量降雨的地區，或江河入海岸處。 因此，鹽度通過蒸發減少水分而上升或通過降水或徑流增加淡水成分而下降。
一般來說，在陽光很強烈的熱帶地區，海水的鹽度略高於世界上其它沒有熱帶那樣多的蒸發的地區。 同理，在江河稀釋海水的海岸地帶，海水鹽度略低於其它海區。
第三個可以變更鹽度的過程與海洋中冰的形成和融化有關。 海水凍結時，溶於其中的物質被留了下來。 這樣，在新形成的海水冰面的正下方的`海水比在冰形成之前有更高的鹽度。 當然，當冰融化的時候，會降低周圍水中的鹽度。 在南極洲邊緣的威德爾海中，結冰過程增加低溫海水的鹽度，從而形成了濃度最大的海水。 這些大密度的海水下沉，可以在世界海洋的深水域發現。
英語作文400字 篇2
A Classmates Reunion
I’m a middle school student in Grade 8. Yesterday was Saturday and some of my classmates in primary school had a reunion at our primary teacher’s home. Our teacher taught us for four years and she treated as her own children. We loved her very much. In the afternoon, we just talked and shared our lives in middle school. Happily, most of us have a rich and happy life. Our teacher told us some interesting stories of her new students. After that, we made a big dinner together. Our teacher is a brilliant cook who can make delicious foods. We all ate much. After dinner, we watched TV for a while and then we went home. It was really a good day.
英語作文400字 篇3
這次的新型冠狀病毒使多少醫務人員在前線沒有回家過年，想念他們的親人，有多少小朋友見不到自己的父母，他們每日每夜的還要冒著生命危險來保護我們，在這次疫情中很多醫務人員被傳染，長期口罩帶著，臉部以壞，看見他們躺在地上那一幕，我也心痛，是你們的.犧牲換來了我們的平安，我相信有了你們我們國家會早日消滅疫情。你們辛苦了！
This novel coronavirus has made many medical workers not go home for the new year at the front line. They miss their relatives, how many children do not see their parents, and they risked their lives every day to protect us. Many medical workers were infected in the epidemic, and the mask was worn and their faces were bad. Your sacrifice brings us peace. I believe that with you, our country will eliminate the epidemic as soon as possible. You've been working hard!
謝謝你們
Thank you
英語作文400字 篇4
Mid-autumn Festival is a popular and important lunar harvest festival celebrated by Chinese people. The festival is held on the 15th day of the eighth month in the Chinese calendar. There are some traditions in this holiday. For example, people would have a big dinner with there families.
After dinner, they often enjoy the full moon which is round and bright. The other tradition of mid-autumn festival is eating moon cake. Moon cake is the essential of that day, which means reunion. As time goes by, there are various kinds of moon cakes, but they are much more expensive than before. I like mid-autumn festival because my families will get together and have a big dinner on that day.
英語作文400字 篇5
I am a student from another place in the country。 I have came back to my hometown recently。 What I saw there made me very surprised and sad。
My hometown was very beautiful in the past。 There use to be many trees everywhere 。 But now the trees on the mountains have been cut off。 And the river turned black。 Fish are not in it any longer。 Sand storms often attack my hometown。 Many people have to leave there。
It is our human being’s fault that the environment has got so bad 。 We’d better to take actions immediately to protect the environment。
英語作文400字 篇6
It was October 12th yesterday. My friends held a birthday party for me. In the morning, they came to my home early, and they brought many presents for me. I liked them very much. I invited them to the KTV, we sang songs, danced and played games. About 5:30 p.m., wewentmy home.
My mother had cooked a delicious dinner for r dinner, we watched TV and at about 8:30 p.m. we ate birthday e were fifteen candles on my birthday cake. I made a silent wish, and then I blew the candles out in one breath. I had an interesting birthday party. We had a good time in the party. I was so grateful to what they did for me.
英語作文400字 篇7
on the new year’s eve, our family gets together, my parents made the big dinner, we ate dinner at about five o’clock, we talked so happily.
after finishing the dinner, my sister and i were so excited, because we planned to see the firework. in my hometown, people can play the firework as they want, people play all kinds of firework every year, it is so beautiful. when the time was about 9 o’clock, i heard the voice, then i looked at the sky, the darkness was lighted up by the firework, i saw many different pictures of firework, all were beautiful. i couldn’t blink my eyes, i was afraid of missing the beautiful moment.
i love firework’s night.
