Such a change may not be necessary for your distribution.

　　對于您所使用的版本可能不需要這種更改。

　　Would it be necessary for me to pay all the money before the trip?

　　我必須在旅行出發(fā)前支付全部費用嗎？

　　But I'm afraid that it will be necessary for us to ask you to change rooms for the last two nights.

　　不過，恐怕最后兩天我們得請您搬到別的房間去。