The sundial's counterpart, the water clock, was designed to measure temporal hours at night.

日晷的对应物是水钟，用来测量夜间的时间。

youdao

The water clock told the time by the water level in the bowls.

水钟是根据碗中的水位来报时的。

youdao

The Greeks used the water clock, or clepsydra.

希腊人使用的水时钟，或秤。

youdao

This man said at about five o'clock in the morning, he heard the dam collapse and all of sudden the water rushed towards the houses.

VOA: standard.2009.03.27

Various Y2K experts predict that some of the nation's water supplies will fail when the clock strikes midnight because of computer problems, but the water utility industry strongly disagrees.

CNN: Y2K fears open flood of bottled water sales

Workers have been skimming oily water around the clock near Vicksburg, Miss.

NPR: Oil Leak: Miss. River At Vicksburg Remains Closed

The pinch will be on farmers like Johnny Howell who run water to plants around the clock, without much hope of turning a profit.

NPR: Tennessee Drought Stunts Growth of Local Crops