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双刃剑 [shuāng rèn jiàn] rapier 以上来源于: 《新汉英大辞典》rapier ['reipi�0�5] n. 1. (窄长的)双刃剑 2. (决斗或剑术中用的)轻剑
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double-edged sworddouble-edged sword[edit] Etymology from the notion that even as one edge of a two-edged sword can be directed at an enemy or otherwise do your bidding, the opposite edge, pointing back as it does towards you, is at risk of doing you harm
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