point-man

例句：

1. 1. He is the point man for our team's project.
   他是我们团队项目的主要责任人。
2. 2. The point man was responsible for ensuring all tasks were completed on time.
   这位负责人负责确保所有任务按时完成。
3. 3.The point man made sure that everyone understood the importance of the meeting.
   这位负责人确保每个人都理解会议的重要性。