除了口哨，那尖銳的金屬聲音是唱（特殊調音）出來的。

來源: wangyuan 於 2011-12-20 17:05:20 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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