They also move their tails up and down when they swim, while fish move theirs sideside.

而鱼却是冷血动物.鲸鱼甚至长有毛发,不过并不浓密. 它们在游动时也会上下摆动尾巴,不像鱼类是左右摆动尾巴.

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Today in the New York Stock Exchange, all the brokers are tails up.

今天纽约的交易市场, 所有的经纪人都兴致勃勃.

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