English everyday: at the cost of
He saved the lives of the children at the cost of his own.
他以自己的生命为代价救活了孩子们。
At the cost of:以……为代价
For the best is only bought at the cost of great pain.——from 《Thorn Bird》
最大的收获必须以最大的痛苦为代价。——选自《荆棘鸟》
每天学一点点英文,开放心态学习西方世界。(上海天擎)


