代表的英文表达有多个，具体取决于上下文。以下是常见的用法：
名词：representative
动词：represent
副词：on behalf of, in the name of
短语：delegate, deputy, plenipotentiary, chief delegate, permanent representative
例子：
He is a member of the House of Representatives.
The delegate spoke on behalf of his constituents.
The plenipotentiary signed the treaty on behalf of his country.
The permanent representative of the United Nations addressed the Security Council.
The chief delegate of the opposition party presented their case.