双刃剑在英语中被称为 double-edged sword。它来源于古希腊神话中有一把名为"埃米尔斯"的双刃剑，埃米尔斯被称为双刃剑之神。关于双刃剑的例句：

这个决定有双刃剑效应，既有利又有弊。

This decision has a double-edged sword effect, both good and bad.

双刃剑带来的后果是，它既可以让你取得成功，也可能让你失败。

The consequence of the double-edged sword is that it can lead to success or failure.

他的智慧虽然是个双刃剑，却给了他无限的力量。

His wisdom, though a double-edged sword, gave him unlimited power.