hang by a thread
岌岌可危；處于極其危險或不確定的情況中
書面·形容極度危險或瀕臨失敗
英文釋義
to be in a precarious or dangerous situation; to be at risk of imminent failure or collapse
例句
After the scandal, his career was hanging by a thread. One more mistake and he's done.
典故來源
源自古希臘神話，達摩克利斯之劍用一根馬鬃懸掛，象征隨時可能降臨的危險。