The unemployment system, which was invented in the 1930s, is still in kind of a time work.

这个失业制度于上世纪30年代制定，目计时工作操作。

There are questions about time-keeping and payment-tracking systems.

有关于工作计时和跟踪付系统的问题。

And that two hundred lightbulbs were tested to make sure they work during the countdown to midnight.

并对200个灯泡进行检测，以们在跨年倒计时期间正常工作。

Today, the light signals work on an electrical timing system.

今天，光信号在电子计时系统上工作。

Using a timer, break your work into 25-minute intervals separated by 5 minutes blocks of rest.

使用计时器，将工作分成 25 分钟的时间段，中间有 5 分钟的休息时间。