kryptonite
释义
氪（仅存在于超人等故事中的化学元素，超人若接近此元素即丧失超常能力）;
例句:
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Market competition is the best kryptonite for cartel power.
来自WSJ
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For his last album, Kryptonite, DJ Fresh had only five guest vocalists, none of whom had had hits in their own right.
来自BBC
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So, weighing up the evidence on Donkey, has the musical kryptonite of relentless touring got to them?
来自BBC