The President nominated me his representative at the meeting.

总统任命我为他的代表出席会议。

I sent my representative to the meeting.

我派了代表参加会议。

China sent a large delegation to the meeting.

中国派了个很大的代表团参加会议。

The conference delegates intermingled with each other over coffee when it broke off.

会时会议代表们混在一起一面喝咖啡一面交谈。