市政官

例句：

1. 1. The ambassador is expected to negotiate with the other country's representatives.
   大使预计将与其他国家的代表进行谈判。
2. 2.The ambassador has been invited to attend a diplomatic conference in Paris.
   大使被邀请参加在巴黎举行的一次外交会议。
3. 3. The ambassador was appointed by the president to represent the country at the UN General Assembly.
   总统任命大使代表国家出席联合国大会。