How much dew would a dewdrop drop if a dewdrop could drop dew?

如果一颗露珠会掉下露水，那么一颗露珠会掉下多少露水呢？

A snow-white swan swam swiftly to catch a slowly-swimming snake in a lake.

湖中一只雪白的天鹅快速地游动着去追赶一条慢慢游动的蛇。

A pleasant peasant keeps a pleasant pheasant and both the peasant and the pheasant are having a pleasant time together.

一位和气的农民养了一只伶俐的野鸡，而且这位和气的农民和这只伶俐的野鸡在一起度过了一段很美好的时光。