the sword of Damocles 死到临头；岌岌可危

【例句】
It is. I've had the sword of Damocles hanging over me for months, and now I can finally relax.
没错，我已经提心吊胆好几个月了，现在终于可以放轻松了。

The shadow of death like a sword of Damocles, may descend at any
死亡的影子如同达摩克利斯之剑，随时都会落下。