謝謝各位的高見。我沒有說清楚，是指用耳機收聽，而且假定耳機質量很好。

來源: ken222 於 2015-04-20 18:02:49 [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.