“双刃剑”的英文怎么说？

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 blessing

a mixed blessing 有利有弊的事物/双刃剑

双刃剑 Double-edged sword

It's a double-edged sword.
它(这种技术)实际上是一把双刃剑。

At the very start, athletic sport is a double blade sword.
竞技体育从一开始，就是一把双刃剑

A metaphor used to refer to something that has both advantages and disadvantages, and positive and negative effects.
报复本身就是一把双刃剑, 你放过他吧。

a sword with two blades
a double-bladed sword

双刃剑 Double-edge sword

The term double-edged sword can be used as an expression for anything that can simultaneously help and hinder

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a sword with two bad