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英语翻译Did you know that the whale is like a land animal?Whales

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英语翻译
Did you know that the whale is like a land animal?Whales live in the sea,but they are not fish.They breathe as land animals do.They must hold their breath under water.
The whale is the largest animal on earth.In fact,it is the largest animal that has ever lived.Dinosaurs that lived long ago were not so large as the largest whales today.
How can any animal be so big?A land animal can have only as much weight as its legs will carry.A bird must be light so its wings can hold it in the air.But a whale does not have to stand on its own legs.The water holds it up.So a whale can be much bigger than a land animal.
你知道吗鲸象是陆地动物.鲸生活在海里,但他们不是鱼.它们象陆地上的动物一样呼吸.在水下,它们必须屏住呼吸.
鲸是地球上最大的动物.实际上,它是史上生活过的最大动物.很久以前的恐龙也没有象今天的鲸鱼这样大.
为什么动物能长这么大呢.陆上动物的重量只能到它的腿所能承受的那样.鸟必须更轻,这样他的翅膀才能在空中支撑飞翔.但鲸不需要用它的腿来站立.水来支撑着它.因此鲸能长得陆上动物大得多的