社会援助英语

help最不正式,特指靠本身力量无法解决的,迫切需要的帮助;

Building more motorways and bypasses will help the environment by reducing pollution and traffic jams in towns and cities...建造更多的高速公路和绕城道路能够减少城镇中的污染和交通堵塞，有利于改善环境。

aid正式些;

They have already pledged billions of dollars in aid.他们已经许诺援助几十亿美元。

assistance最正式,来自assist,只表示起到辅助作用.

Any assistance you could give the police will be greatly appreciated...您提供的任何帮助警方都将万分感谢

aid  英 [eɪd]  美 [ed]

support you forever

social assistance system

help强调主动应别人所需要地帮助; aid尤指不亲自动手地帮助，援助；assist表示作好准备随时提供帮助，尤指以助手的身份给予协助。试比较：She helps her mother at home. 她在家帮助母亲做家务。These scholarships are designed to aid students who can not pay the full tuition. 设立这些奖学金旨在帮助那些无力付全部学费的学生。Several nurses and an anesthesiologist assisted the surgeon during the operation. 手术过程中有几位护士和一位麻醉师协助外科医师。