奸细的英文：
a stool pigeon

Enemy agents plotted to blow up the plant.
敌人奸细密谋炸毁那工厂。

Between two stools you fall to the ground
脚踏两条船,迟早会落水

a rickety stool, table, bed, etc
快要散架的凳子、 桌子、 床等

The stool may contain blood and mucus.
粪便或会带血及黏液。

The sample contains stool and digested blood.
样本里含有粪便和血液。

Between two stools one falls to the ground
脚踏两头要落空

These proud pigeons are the model of birdhood.
这些光荣的信鸽是鸟类的楷模。

A pigeon was cooing up in one of the elms.
一只鸽子在榆树上咕咕地叫。

He was a pigeon, a victim of a confidence game.
他上当受骗了。

All the can shoot is a clay pigeon.
所能射击的不过是一个容易的非移动靶。

Grandmother feeds the pigeons with corn every morning.
祖母每天早晨用玉米喂鸽子。