On behalf of my family, I would like to express our sincere gratitude for your kind help. （我谨代表我的家人，对你的热心帮助表示诚挚的感谢。）

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

On behalf of the company, he attended the important business conference. （他代表公司参加了那个重要的商务会议。）

She accepted the award on behalf of her team. （她代表她的团队接受了这个奖项。）

On behalf of all the students, the monitor presented a gift to the teacher. （班长代表全体学生给老师送了一份礼物。）

The union leader negotiated with the management on behalf of the workers. （工会领袖代表工人与管理层进行了谈判。）

I'm writing this letter on behalf of my friend who is unable to come in person. （我代表我那位不能亲自前来的朋友写这封信。）

On behalf of the organizing committee, we welcome you to this international event. （我们代表组委会欢迎您参加这次国际活动。）

The ambassador conveyed the president's message on behalf of the country. （大使代表国家传达了总统的信息。）

He apologized to the neighbors on behalf of his noisy children. （他代表他吵闹的孩子们向邻居们道歉。）

On behalf of the club members, we invite you to join our upcoming activities. （我们代表俱乐部成员邀请您参加我们即将举行的活动。）

The spokesperson made a statement on behalf of the government. （发言人代表政府发表了一份声明。）

She thanked the guests on behalf of the bride and groom at the wedding. （在婚礼上，她代表新郎新娘向宾客们表示感谢。）

On behalf of the research group, he reported the latest findings at the seminar. （他在研讨会上代表研究小组汇报了最新的研究成果。）

The parent volunteer worked on behalf of the school to organize the charity event. （这位家长志愿者代表学校组织了这次慈善活动。）

I'd like to offer my congratulations on behalf of our department. （我谨代表我们部门向您表示祝贺。）

On behalf of the community, we are trying to solve the environmental problems. （我们代表社区努力解决环境问题。）

The student representative expressed the concerns of the classmates on behalf of them. （学生代表代表同学们表达了他们的担忧。）

He signed the contract on behalf of his company. （他代表他的公司签署了这份合同。）

On behalf of everyone here, I wish you a very happy birthday. （我代表在场的每一个人，祝你生日快乐。

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