例句：

　　We promise to deliver within 48 hours.

　　我們承諾在48小時內(nèi)送到。

　　Promise me you will not waste your time.

　　向我承諾你不會浪費你的時間。

　　I promise I am in this for the long haul.

　　我保證我會堅持到底。

　　If you make a promise, you should keep it.

　　如果你許下一個諾言，你就應(yīng)該遵守它。

　　He reneged on a promise to leave his wife.

　　他背棄了諾言，離開了他的妻子。