You cannot squeeze blood out of a stone.

你不能从石头里挤出血来。

相关名言

When the itch is inside the boot, scratching outside provides little consolation.

当痒在靴子里的时候,在外面抓痒不会给你多少安慰。

Pigs may whistle, but they hae an ill mouth for 't.

猪会吹口哨,但它的嘴却不好使。