up and down, ups and downs, up's and down's
這3個分別有什麼意思?
(其實只是不明白最後者)
收錄日期: 2021-04-25 18:31:08
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061203000051KK02392