蓝海Mario
双刃剑:double-edged sword在现在和我们过去的生活中，它都是一柄双刃剑，会使人越来越窒息、也会使人由空虚变得有信仰。 It's potential for good or evil, now and in the years of our lives, smothers exaltations and converts vanity to prayer
wo洒脱小姐
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
牛头梗小城堡
最普通:Every coin has two sides.较好用法：Anything is a double-edged sword 高级用法：Every cloud has a sliver lining. A rose has its thorns. For every plus there is a minus.
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