核心句型：
The project leader will quarterback the meeting.
项目领导人将主持这场会议。
quarterback一般是用来指美式足球中的“四分卫”，在球队里是主力，这个短语的正确意思是：“主持，领导”。因此，当美国人说"The project leader will quarterback the meeting."时，他/她要表达的意思就是:"The project leader will chair the meeting."、"The meeting will be presided over by the project leader."。
情景对白：
Jane: There is a meeting at 2 o'clock. You know?
简：下午两点有个会议，你知道吗？
Shirley: Sure. The project leader will quarterback the meeting, as far as I know.
雪莉：当然知道了，而且据我所知，项目领导人将主持这场会议。
搭配句积累：
①Wow, when will the meeting be held?
哇，那会议什么时候举行啊？
②Then it seems the meeting is of great importance.
看来这个会议很重要啊。
③And the leader will arrive here tomorrow morning.
领导人明天上午到这儿。
④I am looking forward to seeing him.
我一直期望能够见到他。
单词：
preside vt. 主持，担任会议主席
The PM presided over a meeting of his inner Cabinet.
首相主持了一次核心内阁会议。
He presided at the trial of the Maguire Seven.
他主审马圭尔等七人案。
We are very proud and honored to preside at this dinner in honor of Chairman Smith.
我为能在此为史密斯董事长主持晚宴而深感骄傲和荣幸。