8 G( l" W( h: g) n0 m! q9 ]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。 / b; [: F8 _; ]5 ^+ ]1 i " R% f- M1 e8 e; X& K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. # V9 ^3 o* z, C: ~2 q/ ]9 Q' V2 q. ]# l8 |) i& Z3 J