2014年4月自考英语二填句补文文章翻译

Biological Clock

When the sun rises on awarm and sunny day, you can see some flowers open up. When they close late inthe afternoon, other flowers open.

Biological rhythms (生物节律), like the opening andclosing of flowers, happen all over nature. But not all of them are dailyrhythms. Some, like the beating of our heart, happen every second.  Other rhythms are based on months, seasons oryears.

Scientists use the termbiological clock to describe the timing that controls biological rhythms. But where can you find it? In some animals it is probably controlled bythe brain. In plants and other living things that have no brain, it must besomething else.

The migration of animalshappens when a signal is sent out. For example, when days become shorter, birdsleave the northern parts of the world and fly south where it is warm. In the summer they fly backto have babies.

Humans also havebiological clocks that control their daily rhythms. When people travel by planefrom one continent to another, they often cross many time zones. Their internalclocks don’t seem to work correctly. We call this jet lag (时差). This makes them feel tired. People who work night shifts also haveproblems with their biological clocks. They may not be as active as people whowork during the daytime.

Biological clocks controlmany rhythms of life. We are learning more andmore about them. Doctors are looking for new ways to maketraveling more comfortable and medical treatment more effective.

翻译上述文章

生物钟

当太阳在一个温暖而阳光明媚的日子升起时，你可以看到一些花儿开始绽放。当它们在下午晚些时候闭合时，另一些花儿则开始开放。生物节律（如花朵的开合）在自然界中随处可见。但并非所有的生物节律都是日节律。有些，如我们的心跳，是每秒发生一次。其他节律则基于月、季节或年。

科学家用生物钟这个术语来描述控制生物节律的时间。但你能在哪里找到它呢？在某些动物体内，它可能由大脑控制。在植物和其他没有大脑的生物体内，它一定是由其他东西控制的。

动物迁徙发生在收到某种信号时。例如，当日子变短时，鸟类会离开世界的北部，飞往南方较温暖的地方。在夏天，它们又会飞回来生育。

人类也有控制日常节律的生物钟。当人们乘飞机从一个大陆飞到另一个大陆时，他们经常会跨越许多时区。他们的内部时钟似乎无法正常工作。我们称这种现象为时差反应。这使他们感到疲劳。夜班工作的人也会遇到生物钟的问题。他们可能不像白天工作的人那样活跃。

生物钟控制着许多生命的节律。我们正在不断地了解更多关于它们的知识。医生们正在寻找新的方法来使旅行更加舒适，并使医疗治疗更加有效。