It will update your system clock time, synchronizing it with atomic clocks through the Internet.

该软件将更新你的系统时间，通过因特网使用原子时钟同步你的系统时间。

youdao

While you and I know what an hour is, the people who invented the word had no clocks and for them an hour was not so much a length of time as a milestone through the course of the day.

虽然你我都知道hour是什么意思，但在发明这个词的年代，人们还没有时钟，hour并不完全指一段时间的长度，而更像是一天当中的某个时间点。

youdao

On the other hand, GPS satellites high in orbit experience less of earth's gravity and this travel noticeably faster through time than we do which is why their clocks are calibrated to run slow.

另外，高空轨道上的GPS卫星受到地球引力更小，穿梭的速度也就比我们更快。这也是为什么卫星时钟被调慢了。

youdao

Then through the use of GPS-based reference clocks at each tower (for both time and frequency), the signals are synced so each can emit a perfect copy of both signal and symbol data.

ENGADGET: blogger-avatar

My first assumption was that there was an electrical fault, but as the time settled on 5 minutes past one, I suddenly realised that it was "'clocks going back time" ...and I would have to sit through that whole hour again!

BBC: A mean time for doctors