It has a spring in it.

注：spring既有“發(fā)條”的意思，也有“泉”的意思。

更多英語謎語

What crime is punishable when attempted but not when committed?

What can you hold in your left hand but not in your right hand?

Foward I am heavy, but backward I am not. What am I?

What rock is also a food?