新技术是一把双刃剑，既提高了效率，也可能导致失业。

New technology is a ___double-edged sword—it boosts efficiency but may cause job losses.

他的建议是双刃剑，既可能帮你解决问题，也可能让你陷入麻烦。

His advice was ___double-edged, potentially solving your problem or getting you into trouble.