time keeper造句
(1) Of course. You are the time keeper here.
(2) The time keeper rings a bell to indicate the beginning and end of rounds.
(3) Known as the circadian clock, this internal time keeper manages the body's daily rhythms, regulating when to sleep, wake, eat and many other functions of the body.
(4) OMEGA, one of its luxury brands, has been the official time keeper of Olympics for 23 times.
(5) It meant that I had to be the disciplinarian, time keeper, leader and so many other roles.