例句：
We promise to deliver within 48 hours.
我們承諾在48小時(shí)內(nèi)送到。
Promise me you will not waste your time.
向我承諾你不會浪費(fèi)你的時(shí)間。
I promise I am in this for the long haul.
我保證我會堅(jiān)持到底。
If you make a promise, you should keep it.
如果你許下一個(gè)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。