they are interchangeable

來源: sportwoman 於 2012-05-25 06:32:46 [] [博客] [舊帖] [給我悄悄話] 閱讀數 : (0 bytes)
回答: you are right Bro it works the same as refrain 由 sportwoman 於 2012-05-25 06:20:13
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