He is authorize to speak on behalf of the company.

他被授权代表公司发言。

They will depute a representative to speak on their behalf.

他们将委任一名代表代他们发言。

It was presumptuous of him to assume he could speak on behalf of the entire group.

他认为自己可以代表整个团队发言，这种想法太冒昧了。

They are best qualified to speak on this question.

他们对这个问题最有发言权。

It is honor to be here to speak on behalf of General Motors and to participate in this conference on the strategic issues facing this wonderful and dynamic city of Shanghai.

我很荣幸能在这里代表通用汽车公司发言，能出席这次会议，讨论上海这座充满活力的美好城市所面临的战略问题。

It is honor to be here to speak on behalf of General Motors and to participate in this conference on the strategic issues facing this wonderful an dynamic city of Shanghai.

我很荣幸能在这里代表通用汽车公司发言，能出席这次会议，讨论上海这座充满活力的美好城市所面临的战略问题。

How you speak on the telephone is very important!

你在电话里如何说话是非常重要的！

Speak for make a request for; speak on behalf of

要求得到；为……说话，为……辩护

What can you speak on God's behalf today?

今天你能代表上帝说什么？

How was this jealousy manifested? Speak on.

告诉我，这种嫉妒心是怎样表现出来的？