英汉词典

1. 代表（亦使用 in someone's behalf，主要用于美国英语中）
    If you do something on someone's behalf, you do it for that person as their representative. The form in someone's behalf is also used, mainly in American English.

behalf在线翻译

    e.g. She made an emotional public appeal on her son's behalf...
           她代表儿子动情地发出了公开呼吁。
    e.g. Secret Service officer Robin Thompson spoke on behalf of his colleagues.
           特工处官员罗宾·汤普森代表他的同僚发表了讲话。

2. 为（某人）；替（某人）
    If you feel, for example, embarrassed or angry on someone's behalf, you feel embarrassed or angry for them.

    e.g. 'What do you mean?' I asked, offended on Liddie's behalf.
           “你什么意思啊？”我问，替利迪感到愤愤不平。