timekeeper

名词 timekeeper:

1. (sports) an official who keeps track of the time elapsed
   同义词：timer
2. a clerk who keeps track of the hours worked by employees
3. a measuring instrument or device for keeping time
   同义词：timepiece, horologe

1. One who keeps track of time; a timekeeper.
   计时员一个记录时间的人; 计时员