大学英语作文300字五篇

在学习、工作乃至生活中，大家都经常接触到作文吧，写作文是培养人们的观察力、联想力、想象力、思考力和记忆力的重要手段。相信很多朋友都对写作文感到非常苦恼吧，下面是小编精心整理的大学英语作文300字5篇，欢迎阅读与收藏。

大学英语作文300字 篇1

如果我们分析海水的盐度，会发现地区间只有轻微的变化，然而有些小的变化是重要的。 导致海洋的盐度变化的基本过程有三个。

其中之一是通过蒸发的方式即把液态水转化为水蒸气来减少海洋中的水分。这样由于盐留了下来，所以盐度增大。

当然，如果这种方式走向极端，将会余下白色的盐晶体。 与蒸发相反的是降水，如降雨，由此水被加入海中，海水被稀释，从而盐度降低。 这种情形会发生在大量降雨的地区，或江河入海岸处。 因此，盐度通过蒸发减少水分而上升或通过降水或径流增加淡水成分而下降。

一般来说，在阳光很强烈的热带地区，海水的盐度略高于世界上其它没有热带那样多的蒸发的地区。 同理，在江河稀释海水的海岸地带，海水盐度略低于其它海区。

第三个可以变更盐度的过程与海洋中冰的形成和融化有关。 海水冻结时，溶于其中的`物质被留了下来。 这样，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盐度。 当然，当冰融化的时候，会降低周围水中的盐度。 在南极洲边缘的威德尔海中，结冰过程增加低温海水的盐度，从而形成了浓度最大的海水。 这些大密度的海水下沉，可以在世界海洋的深水域发现。

大学英语作文300字 篇2

My friend Vivi is a lively and smart girl,she has long black hair and she is a tallest girl in our is warm-hearted and good- looking so that everyone loves her.I'm so glad to make friend with her.I'm out-going too,so we have been good friends for long sometimes I like quiet but she doesn' her marks are not good as ,i suggested her that she should work-hard in her study so that we can go to the same university.

This person is my best friend Vivi who i can tell everything my deeply feelings and thoughts

大学英语作文300字 篇3

Chinese New Year is the longest and most important celebration in the Chinese calendar. Chinese months are reckoned by the lunar calendar, with each month beginning on the darkest day. New Year festivities traditionally start on the first day of the month and continue until the fifteenth, when the moon is brightest. In China, people may take weeks of holiday from work to prepare for and celebrate the New Year.

结语：春节到了，意味着春天将要来临，万象复苏草木更新，新一轮播种和收获季节又要开始。

大学英语作文300字 篇4

The world is enveloped in moonlight. A poetic feeling arises and softness pervades the atmosphere. At this time, a breeze of ten accompanies the silvery light of the moon and gives the world a peculiar appearance and the people a peculiar feeling. The air is suffused with a sweet scent, driving away the ugliness and squal or of the daytime, soothing the distressed and wretched souls. If

you sing a song, your voice will reach the clouds. If you read a poem, it will echo in the mountains and valleys far away. If you hum a lullaby, its rhythm will send the whole sleepless city to dreams.

大学英语作文300字 篇5

july 20th 1969 was an important day for the human american astronauts landed on the moon. it was the first time for man to be on the moon. as soon as they got there, they put a television camera on the moon in order to let the people on the earth watch them on tv at home. before they left the moon, they collected some moon rocks and brought them back to the earth. a new age of eploration began.