Q

A ship can contain only fifty persons. Now there are alreadyforty-nine persons in it. At this time，a pregnant woman comes on and boards the ship. The ship sinks. Why?
有一艘船只能容纳50人，现在已有49人。这时一位孕妇上了船，船就沉了。为什么？

A

Because it is a pigboat.
那是潜水艇。

点睛一笔

pigboat是指“潜水艇”。潜水艇是能够在水下运行的舰艇，当能够容纳50人的潜水艇已经有50位乘客后，它当然要开始航行，潜入水下啦，所以不要想当然地认为“孕妇相当于两个人导致船沉”啦！