make a promise:
作出诺言,保证
1. If you make a promise, you should fulfil it.
你苦是作出允诺,就必须履行.
2. He made a promise of help, as I pleaded with him again and again.
我再三央求,他才答应帮忙.
3. If you make a promise you should keep it; you ought not to break a promise.
如果你作出了承诺,你就应该遵守诺言,不应该食言.