time keeper

The Organizing Committee will also select an official time-keeper for both competitions.

组委会将为每场比赛安排一位官方计时员.

OMEGA, one of its luxury brands, has been the official time keeper of Olympics for23 times.

其旗下的欧米茄（OMEGA）23次成为奥运官方指定计时器。

In all my travels ( all the jobs I've ever held), once I got beyond the learning phase, once I'd mastered the ins and outs of the job, I was bored-painfully bored, and I watched the clock like a time keeper at a sporting event.

在我所有的旅程中（所有我做过的工作），一旦我度过了学习期，一旦我掌握了这个工作的所有细节，我就会很无聊——非常无聊！比如我在运动会上就会不停地看表，简直就像个计时器！

The time keeper rings a bell to indicate the beginning and end of rounds.

计时员打铃表示第一局比赛的开始和结束。