pledge和promise有什么區(qū)別

　　pledge例句分享

　　The government pledged their support for the plan. （用作動(dòng)詞）

　　政府保證支持這項(xiàng)計(jì)劃。

　　The pledge has long since run out. （用作名詞）

　　抵押早已期滿。

　　They were all pledged to secrecy. （用作動(dòng)詞）

　　他們都宣誓保密。