Almost any sailor could tell what his longitude was by simply looking at a clock.

VOA: special.2010.07.14

I hear, perhaps, the sounds of the cars outside my house, my alarm clock ringing, what have you.

我听到,轿车的声音从室外传来,或是闹钟的铃响,随你想象

耶鲁公开课 - 死亡课程节选

So what this says is, you can measure time by having your own clock.

也就是说,你可以用时钟来测量时间

耶鲁公开课 - 基础物理课程节选

"Memorial should not dictate to us what we do in our own time, off the time clock."

VOA: standard.2010.02.18

What did it produce? The cuckoo clock.

产出了什么？，咕咕钟。

耶鲁公开课 - 政治哲学导论课程节选

It was scheduled to arrive in Tripoli at 6 o'clock " "We don't know where the communication failure happened, but what we can confirm is that were on board at the time."

VOA: standard.2010.05.12

A clock tells you what time it is, but you can also say what time it is by seeing how fast the particle is moving because you know it started with some speed.

时钟能告诉你现在的时间,但你也可以通过测量质点速度,来判断当前的时间,因为你知道它的初速度

耶鲁公开课 - 基础物理课程节选