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

• 老师：从生理上来讲，鲸鱼是不可能吞下一个人的。因为尽管鲸鱼是很大的哺乳动物，可是它的喉咙却很狭小。