英语作文 篇5
Human vision like that of other primates has evolved in an arboreal environment. In the dense complex world of a tropical forest, it is more important to see well that to develop an acute sense of smell. In the course of evolution members of the primate line have acquired large eyes while the snout has shrunk to give the eye an unimpeded view. Of mammals only humans and some primates enjoy color vision.
The red flag is black to the bull. Horses live in a monochrome world .light visible to human eyes however occupies only a very narrow band in the whole electromagnetic spectrum. Ultraviolet rays are invisible to humans though ants and honeybees are sensitive to them. Humans though ants and honeybees are sensitive to them.
Humans have no direct perception of infrared rays unlike the rattlesnake which has receptors tuned into wavelengths longer than 0.7 micron. The world would look eerily different if human eyes were sensitive to infrared radiation. Then instead of the darkness of night, we would be able to move easily in a strange shadowless world where objects glowed with varying degrees of intensity. But human eyes excel in other ways.
They are in fact remarkably discerning in color gradation. The color sensitivity of normal human vision is rarely surpassed even by sophisticated technical devices.
英语作文 篇6
protecting the Environment
Environmental problems are becoming more and more serious all over the world. For example, cars have made the air unhealthy for people to breathe and poisonous gas is given off by factories. Trees on the hills have been cut down and waste water is being poured continuously into rivers.Furthermore, wherever we go today, we can find rubbish carelessly disposed. Pollution is, in fact, threatening our existence.
The earth is our home and we have the duty to take care of it for ourselves and for our later generations. Fortunately, more and more people have realized these problems. Measures have been taken to cope with these problems by the government. Laws have been passed to stop pollution. I hope the problem will be solved in the near future and our home will become better and better.
Environmental problems are becoming more and more serious all over the world. With the development of industry and agriculture, cars make GREat noises and give off poisonous gas. Trees on the hills have been cut down,and waste water is being poured continuously into rivers. Furthermore,wherever we go today, we can find rubbish carelessly disposed. The whole ecological balance of the earth is changing. Massive destruction of environment has brought about negative effects and even poses a great threat to man's existence.
We must face the situation that exists and take actions to solve our environmental problems. For instance, new laws must be passed to place strict control over industrial pollution, the pub!ic must receive the education about the hazard of pollution and so on. We hope that all these measures will be effective and bring back a healthful environment.
保护环境
全世界的环境问题变得越来越严重。例如汽车污染的空气影响了人们的呼吸，工厂释放污染的气体，山上的树木被砍伐，污水不断被排人河里。另外，无论我们走到哪里，到处可见随意丢弃的垃圾。事实上，污染正威胁我们的生存。
地球是我们的家园，我们有责任为我们自己和我们的后代去照顾好它。庆幸的是，愈来愈多的人们已经意识到这些问题。政府已经采取了很多措施去解决这些问题，法律已被通过以制止污染。我希望这些问题在不远的将来能得到解决，我们的家园变得越来越好。 全世界的环境问题在变得越来越严重。随着工农业的发展，汽车制造噪音、排放毒气，山上的树木被砍伐，污水不断被排入河里。另外，无论我们走到哪里，到处可见随意丢弃的垃圾。整个地球生态平衡正在改变，环境的巨大破坏已带来负面影响，甚至对人类生存带来巨大威胁。
我们必须面对现实，采取行动解决环境问题。例如必须通过新的法律严格控制工业污染问题，大众必须接受污染危害的教育等。我们希望这些措施的有效实施能带给我们一个健康的环境。
英语作文 篇7
I like play football very much
I like play football very much.I think it is one of the most popular way to relax.And it can help your body grow more strong.I often play football on PE lesson and after school.In this way I make friends with a lot of football-liker.we always play together.Football bring me so much,I like it!
我非常喜欢踢足球。我认为这是最受欢迎的放松方式。它能帮助你的身体变得更加强壮。我经常在体育课上和放学后踢足球。这样我结交很多足球爱好者.我们总是一起玩。足球带给我太多，我喜欢它！
英语作文 篇8
The Real-name Train Ticket Purchase System Launched
With the largest population in the world and an underdeveloped railway system, China is notorious for making train tickets particularly hard to purchase for ordinary citizens, especially during the Spring Festival when the railway is the primary means of transportation. As a result, ticket scalpers have proliferated, monopolizing a large quantity of tickets by either hiring people to buy tickets or conspiring with the ticket sellers within the railway stations.
As the entire nation’s outrage over ticket scarcity keeps mounting, the Chinese government has introduced the drastic measure that citizens purchase train tickets with valid personal IDs. The system is designed primarily to crack down on ticket scalpers whose business has developed into a major industry. By allowing each inpidual to buy only one ticket, the system seeks to make tickets accessible to people in real need, rather than controlled by a small number of profit-seeking and illegal scalpers.
However, this reformatory measure, while somewhat easing ticket scarcity, creates new problems. Buyers find the whole buying process troublesome and time-consuming. When boarding the train, the passenger who forgets to bring his valid ID certificate will be denied access to the train. I believe the introduction of each new system is coupled with shortcomings and there must be ways to improve the system as it is enforced. Of course, we look forward to the day when China’s railway networks are so sufficiently developed that tickets are readily available to anyone at any time.
英语作文 篇9
During the winter vacation, nothing is different for my life. I wake up 11 o’clock Am everyday, after a washing, I have a good lunch with my parents. Next I play computer games till the time to have supper. After have dinner. I go on playing till 2 o’clock Am, and then go to sleep with tired. This is one dull day of my winter vacation. But I haven’t bored all the time. Sometimes I read the books, sometime I listen to the music or the radio in the bed，because it was very cold outside and snowy all the day. And I also meat some of my good friends during the vacation ,we have a very long talk about the life of each other in the past year and play table tennis tegether .And I watched the spring festival party of the CCTV in the last seconds of the 20xx year! I think this is the thing most people of china doing at that time.
That’s all, all my dull, coldly and snowy winter vacation.英语作文 篇10
my hobby is reading
my hobby is reading,for i think reading can make a person know more about the world and make a person to be a better one to live and learn and work .since i was five years old, my father bought me the first picture book , i am interested in reading . then i read a lot books, including fary tales , world famous novels, history books, biographies, and so on . i like reading so much ,for it mkes my life colorful ,wonderful ,and beautiful ! it makes me a better person and gives me a better life .thanks to reading !
我的爱好是读书，因为我认为阅读能使人更了解世界，使人成为一个更好的生活、学习和工作。自从我五岁的时候，我父亲给我买的第一本图画书，我的阅读兴趣。然后我读了很多书，包括世界著名的童话故事，小说，历史，传记，等等。我很喜欢读书，因为它属于我的生活丰富多彩，美妙的，美丽的！它使我成为一个更好的人，给我一个更好的生活。感谢阅读！
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