例句：

　　If it's convenient I can come tomorrow.

　　方便的話(huà)，我可以明天過(guò)來(lái)。

　　I'll call back at a more convenient time.

　　在方便的時(shí)候我會(huì)回電話(huà)的。

　　It is very convenient to pay by credit card.

　　用信用卡付款非常方便。