aid 正式用词，指帮助他人脱离危险或战胜困难，着重强者对急需帮助的弱者的帮助。
assist 强调在提供帮助时，以受助者为主，所给的帮助起第二位或从属的作用。
help 最普通用词，含义广泛。指一般性的或迫切需要的帮助，侧重积极地为他人提供物质、精神或其他方面的帮助。
参考例句
1. to assist the economic development by encouraging the foreign investors 通过鼓励外国投资者的方法促进经济发展
2. Openly shares information to assist others with their jobs. 公开地分享信息以帮助他人完成工作。
3. Assist employees in identifying, evaluating and resolving human relations and work performance problems. 协助雇员识别、评估及解决人际关系和工作表现问题。
英英解释
n.
1. the activity of contributing to the fulfillment of a need or furtherance of an effort or purpose
2. (sports) the act of enabling another player to make a good play v.
1. give help or assistance; be of service
2. act as an assistant in a subordinate or supportive function
3. work for or be a servant to
网络释义
assist 辅助;
助功;
助杀;
辅助（装置）;
assist in 帮助(做某事);
帮助（做某事）;
帮助;
参加;
Assist grip （副驾驶）扶手;
登车手柄;
扶手;
(副驾驶)扶手;
ATTENTION ASSIST 注意力辅助系统;
注意力辅助;
力警示体系;
行车提示系统;
magnetic assist 磁性助推装置;
设计的磁性辅助装置;
辅装置;
磁性助推装置，助磁(单稳整极化继电器);
