关于鲸鱼的英文句子

The whale is the life in the sea mammal. Some whale bodies very big,the biggest body is long may amount to 30 meters. Whale's build likesthe fish, assumes 梭形. Forehead big, the eye is small, the helixcompletely degenerates. The pate is not obvious. The foreleg assumesthe fin shape, the latter extremity completely degenerates; The mosttypes carry on the back have the fin; The tail assumes the horizontalfin shape, is the main movement organ. Has the tooth or does not havethe tooth. The nostril one or two, open in the top of the head. Theadult whole body did not have the wool (to have many types only stillto preserve some wools nearby mouth). Under the skin has thick fat,may keep warm and reduce bodily the proportion. With the lung breath,namely dives into in the water after the water surface inspiration,may dive swims 10 ~ 45 minutes. Generally take the zooplankton, themollusk and the fish as the food. 胎生， the usual each embryoproduces a young, to the milk nurtures the young whale. But manyperson of minute it is the fish, in fact they are not the fish but arethe mammal. Distributes in the world various sea. The whale, the world various sea have the distribution. It is thewater roosts the mammal, with the lung breath, its type divides intotwo kinds, must the whale class, not have the tooth, has the whale tohave, nostril two, like 长须鲸， 蓝鲸， 座头鲸， 灰鲸 and soon; The toothed whales class, have the tooth, does not have the whaleto have, nostril, likes the sperm whale， 独角鲸， the killer whaleand so on. In the sea in the major part oxygen and the atmosphere 60%oxygen are floats the plant manufacture. Must the whale actually beable to extinguish floats plant's powerful enemy - zooplankton.Moreover, the toothed whales also are helpful to the maintenance fishecological equilibrium. Toothed whales' food is take the fish as thefood large-scale mollusk. Therefore in the world does not have thewhale, the humanity must perish.。

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