clock

I heard the clock strike six (= make six loud sounds ) ..我听到钟敲了六下。

The station clock was ten minutes slow (= showed a time ten minutes earlier than the real time ) ..车站的钟慢了十分钟。

alarm clock,闹钟

around the clock,日以继夜地，连续一整天

clock in,打卡上班；记录上班时间

clock on,打卡上班

digital clock,数字显示式时钟

clock tower,钟楼；钟塔

against the clock,分秒必争地；用秒表记时

round the clock,连续一整天，昼夜不停；毫不疲倦地

biological clock,生物钟

system clock,系统时钟

electronic clock,电子钟

time clock,打卡钟，出勤记录钟

wall clock,挂钟

clock frequency,时钟频率，时钟脉冲频率

internal clock,生物钟；内时钟；内频

clock cycle,时钟周期

turn back the clock,把钟拨慢

real-time clock,实时时钟

turn the clock back,时光倒转；回到过去；把钟拨慢

clock skew,[计]时钟歪斜；时钟脉冲相位差