On behalf
音标：/ɒn bɪˈhɑːf/
中文翻译：代表、替代
用法：
“On behalf”表示“代表某人或某事”的意思，通常用于正式或庄重的场合，表示以某人或某组织的名义做某事。可以用来指代代表他人做的行为，也可以表示代表某个团体或组织行事。

例句：

I am speaking on behalf of the company to announce the new product.
我代表公司宣布新产品。

She accepted the award on behalf of her team.
她代表团队接受了奖项。

I would like to thank you on behalf of everyone here.
我想代表在场的所有人感谢你。

The lawyer spoke on behalf of the defendant during the trial.
在审判中，律师代表被告发言。

On behalf of the board of directors, I would like to thank you for your hard work.
代表董事会，我想感谢你们的辛勤工作。

They wrote a letter on behalf of the community to request more funding.
他们代表社区写了一封信，要求更多的资金。

I am here on behalf of the organization to discuss potential collaborations.
我在这里代表组织讨论潜在的合作。

He spoke passionately on behalf of the environment during the conference.
在会议中，他激情洋溢地代表环境发言。

On behalf of my family, I would like to express our gratitude for your help.
我代表我的家人，想对你的帮助表示感谢。

We are acting on behalf of our clients to resolve this issue.
我们代表客户处理这个问题。

词组搭配：

On behalf of (代表某人或某组织)

On behalf of the president

On behalf of my colleagues

Speak on behalf of (代表某人发言)

Speak on behalf of the team

Act on behalf of (代表某人行事)

Act on behalf of the company

总结：

"On behalf" 常用于正式场合，表示“代表某人、某组织或团体行事”。它常用在发言、接受奖励、写信等场合，表明某人是以他人的名义或利益为出发点做某事。