1、I am honored to speak on behalf of my country.
代表我們國家做這次演講，餓哦感到萬分榮幸。

2、In 2009, I received an invitation to speak on behalf of the guests. It was a distinct honour.
2009年我受到邀請代表賓客致辭，這是一個重要的榮譽(yù)。

3、That is why I am curious who are they, are they qualified enough to speak on behalf of the state.
正因為如此，我很想知道他們都是誰，他們是否有資格代表國家發(fā)言。

4、So who will speak on behalf of nature?
那么誰來替大自然說話呢？

5、I am here to speak on behalf of the starving children around the world whose cries go unheard.
我演講是為了世界所有忍受饑餓的兒童，而他們的哭泣卻無人聽見。