If your system doesn't provide the standard watch command and you don't have the time or inclination to build the procps package for your system, you can easily simulate it with a simple shell script.

如果您的系统没有提供标准的watch命令，您又不愿意花时间构建procps包，那么可以用一个简单的shell脚本模拟它。

youdao

This wrist computer comes in five colors and is only a bit bigger than a more standard watch.

WSJ: Watch Keeps Alerts From a Phone at Arm's Length

Digital cable offers customers far more channels to watch than standard cable--typically in the hundreds-- and gives them an interactive on-screen program schedule.

FORBES: Cable Companies Dish Data

The standard version of the watch uses a black dial with large white luminous numerals along with a red Alpina triangle on the second hand.

FORBES: Alpina Takes to the Air with New Pilot Watches