补全短文-第七篇 动物界中的时间 (500字)
第七篇Time in the Animal World
Rhythm〔节奏〕 controls everything in Nature.
The sun provides a basic time rhythm for all living creatures〔生物〕including humans. Nearly all animals are influenced〔影响〕by sun cycles and have developed a biological clock in their bodies following these cycles. The moon also exerts〔发挥〕its force and influence on the sea. Its gravitational〔万有引力的、重力的〕attraction〔吸引〕causes the rising of the tide〔潮汐〕. The tide goes out when the moon the moon is behind the Earth, centrifugal force causes the second tide of the day.
Animals living in tidal areas must have the instinct〔本能〕of predicting〔预测〕these changes, to avoid〔避开〕being stranded〔使…滞留〕and dying of dehydration〔脱水〕. Since the time of the dinosaurs〔恐龙〕, the king crab has been laying eggs at the seaside in a set way. To avoid predator〔以掠食为生〕fish，the eggs are always far from seawater and protected by sand. In the following two months ，the eggs undergo〔经历〕dramatic〔戏剧性的〕changes related to the cycles of the moon. When the second sping tide comes, the young king crabs〔鲎〕have matured〔成熟〕.
Most of the mammals t either the giant〔巨大的〕elephant or the small shrew . have the same average total number of heartbeats in their lifetime. Shrews live only for two and a half years. and spend their life at a high speed and high tempo〔拍子、速度〕. Animals like shrews with a pulse〔脉搏〕rate of 600 per minute have an average total of eigbt hundr~ million heartbeatsS throughout their life. The African elephant has a pulse rate of 25 beats〔跳动〕per minute,and a life span〔寿命〕 of 60 years. The size of the body determines〔决定〕the speed of life. As we get older, our sense of time is being influenced〔影响〕by the
physiological changes of our body. The elderly〔老年人〕spend more time resting， and do few sports. For a child , a week is seen as long time.
练习：
A For an adult〔成年人或动物〕, time goes fast year by year.
B It controls , for example , the flapping of birds' wings〔翅膀〕, the beating of the heart and the rising and setting of the sun.
C The larger the anirnal is , the longer its life span is and the slower its life tempo is.
D The tide goes out when the moon moves away and its attraction is weaker. E We always tend to think all the anirnals have the same sense of time as human beings.
F The second spring tide takes them back to the sea.
第七篇动物界中的时间
节奏控制着自然界中的一切事物。例如，它控制着鸟类拍击翅膀、心跳和日出与日落。
太阳为所有的生物，包括人类，提供了一个基本的时间节奏。几乎所有的动物都受到太阳周期的影响并随其在体内形成了一个生物钟。月亮也对大海施加力量和影响，其地心引力造成涨潮。当月亮移走、引力比较弱的时候，就会发生退潮。当月亮位于地球另一面的时候，离心力就会引起这一天中的第二次涨潮。
生长在潮汐地区的动物具有预测潮汐的本能，以免被搁浅而死于脱水。从恐龙时代开始，鲎就以一种故有的方式在海边产卵。为了防止食肉鱼吞食，它们常常远离海岸产卵，并用沙子把卵保护起来。在接下来的两个月里，这些卵经受与月亮周期有关的巨大变化。当第二次春潮来临时，小鲎已破壳而出，这次涨潮会把它们带回到大诲。
大多数哺乳动物，无论是大象还是嗣脯，其一生心跳的总次数大致相同。翩
睛只有两年半的生命，它们以高速度和快节奏度过短暂的生命。像翩黯这种脉搏每分钟跳动600次的动物，一生心跳总次数平均为8亿次。非洲大象的脉搏每分钟跳动25次，它们的平均寿命为60年。体型的大小决定生命的速度，动物的体型越大，它们的寿命就越长，生命节奏也就越慢。
随着年龄的增长，身体的生理变化就会影响我们的时间感。老年人花费较多时间休息，他们较少做运动。对成年人来说，时间一年一年地过得很快。对孩子来说，一周时间被看作很长一段时间。