本帖最后由 billzhao 于 2012-5-19 12:12 编辑 9 `% t3 l5 e% [; l, m2 q" h* V" v7 {9 ^% y: g9 S
好像南方或者北方有的地方s sh不分,下面视频应该有所帮助。$ ?# S8 F' d T/ M' d
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很喜欢老师的自信,她说 It's simple. It's easy. Once you watch this video, you get it, and you'll never make the mistake again. People will understand you, and your life will be fantastic. 2 Z- U& E; t% b 5 e. D1 f) n& P" R( v9 j$ R9 ^3 ]8 ~$ p4 C$ B' K