get blood out of a stone meaning in Chinese

得到铁石心肠人的同情

They finally figured out how to get blood out of a stone
他们终于知道如何摆弄这玩意了
It ' s no use asking you father for a loan . you can ' t get blood out of a stone
向你父亲借债是徒劳的，你休想从吝啬鬼手里要到钱。
The inland revenue have sent me a tax bill for more than a hundred pounds , but they can ' t get blood out of a stone because i just haven ' t got the money
国内税务署寄给我一张100多英镑的税单，不过他们不可能从石头里榨出油来，因为我并没有那么多钱。