a powder kegSERIOUS SITUATIONa dangerous situation or place where violence or trouble could suddenly start 火药桶〔比喻暴力或麻烦随时可能发生的危险局面或地方〕 Since the riot, the city has been a powder keg waiting to explode. 自那次骚乱以来,这座城市就是一个随时可能爆炸的火药桶。
a powder keg• Ireland - home, as Joseph called it - had been a powder keg since the Easter Rising three years ago.• The place was a powder keg.
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