We have provided seats for the convenience of our customers.

　　為方便顧客我們備有座位。

　　A glossary of terms is included for the reader's convenience.

　　為了方便讀者，還收錄了術(shù)語匯編。

　　Can you telephone me at your convenience to arrange a meeting?

　　你能不能在你方便時給我來個電話，安排見一次面？