pacesetter
noun /ˈpeɪssetə(r)/
/ˈpeɪssetər/
(especially North American English) (also pacemaker British and North American English)
- a person or an animal that begins a race quickly so that the other people taking part will try to copy the speed and run a fast race
领跑人；领跑动物 - a person or team that is winning in a sports competition
（竞赛中的）领先者，领先队伍