隻有下坡減速時才出現。有這個可能性，

來源: legato 於 2019-06-13 11:56:51 [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.