试着只把舌尖靠在上牙龈处，舌后部一定要放松。舌后部使劲就发ng了。

来源: beautifulwind 于 2011-07-23 20:58:55 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.