To undertake a delicate or important task for which one lacks the necessary skill, thus likely to spoil it; to be incompetent for a critical role.
这项精密的雕刻工作需要极高的技巧，他如果贸然接下，恐怕会操刀伤锦。
This intricate carving work requires extremely high skill; if he rashly takes it on, he might just spoil the brocade with his knife, proving himself incompetent.
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