1.(for)为了某人；替某人
I felt offended on her behalf.我替她感到不平。
2.(as representative of)代表某人；作为某人的代言人
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。
Secret Service officer Robin Thompson spoke on behalf of his colleagues.特工处官员罗宾•汤普森代表其同事发言。
on behalf of sb/sth<英>in behalf of sb/sth<美>
1.(for)+ person, organization为了…
Scientists are campaigning on behalf of local charities.科学家们为当地的慈善机构发起募捐。
2.(as representative of)代表…；代表…的利益；以…的名义
Wilkins spoke on behalf of the Labour Party.威尔金斯代表工党发言。
On behalf of my mother, I …我代表我母亲…
3.(as spokesperson for)作为…的发言人
I approached him on behalf of the committee.我以委员会的名义同他联系。