The teacher said it was physically impossible for a whale to swallow a human because even though a whale is a very large mammal, its throat is very small.

• 老师说，从生理上说，鲸鱼是不可能吞吃掉一个人的，因为尽管鲸鱼是种庞大的哺乳动物，但它的喉咙非常小。