I learned it, too.

来源: 紫君 于 2014-04-15 08:00:13 [] [博客] [旧帖] [给我悄悄话] 阅读数 : (0 bytes)
回答: This is a very useful idiom. Thanks! 由 ~叶子~ 于 2014-04-14 20:46:55
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