Definition
To attempt to obtain something from someone who is unwilling or unable to give it, often due to their inherent nature or current disposition.
從石头里挤血（指要从某人身上获得某物或探听某事极其困难）
Trying to get the boss to approve an extra budget is like getting blood from a stone.
试图让老板批准额外预算就像从石头中挤出血一样。
Getting him to pay back the money he owes is like getting blood out of a stone; he simply won't do it.
让他还钱就像从石头中挤出血一样；他就是不愿意。
Getting any information out of that tight-lipped investigator is like getting blood from a stone.
从那位守口如瓶的调查员那里获取任何信息就像从石头中挤出血一样。