Question

you can't get blood from a stone.

Answer 1

你不可能得到冷酷者的怜悯.

or

你不能鸡蛋里挑骨头.

or

你不可能得到你不可能得到的东西.

Frequently used,as a resigned admission,to mean that it is hopeless to try extorting money,etc.,from those who have none.Other unyielding or unlikely substances are sometimes substituted for stone; the turnip version is frequent in North America.