例句
A whale is a kind of mammal.
鲸是一种哺乳动物。
The whale is a mammal.
鲸鱼是哺乳动物。
The problem with that theory is that no other mammal has resorted to this method of cooling down.
这一理论的问题在于，没有其他的哺乳动物采取了这种降低体温的方式。
A whale is a kind of mammal.
鲸是一种哺乳动物。
The whale is a mammal.
鲸鱼是哺乳动物。
The problem with that theory is that no other mammal has resorted to this method of cooling down.
这一理论的问题在于，没有其他的哺乳动物采取了这种降低体温的方式。