S素年錦時
楼上几位说的没错，但是都是它的直意！双刃剑 Double-edged sword 此外，在英文中有个最地道的说法是 a mixed blessinga mixed blessing 有利有弊的事物/双刃剑
o0大鹏0o
双刃剑 Double-edge swordThe term double-edged sword can be used as an expression for anything that can simultaneously help and hinder.....................................
