英语
西班牙语
西班牙语
英语
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单语范例（未经PONS编辑处理）
Quartz watches, by contrast, are fairly simple: they use a quartz crystal and electric oscillation to generate very precise timekeeping.
www.businessinsider.com.au A true turret clock has mechanical and latterly electrical power and therefore sits late in the history of timekeeping.
en.wikipedia.org This instrument is important in the study of ancient methods of timekeeping in that it is an example of an inflow water clock.
en.wikipedia.org These rules may, for example, define the expected standards of clothing, timekeeping, social conduct, and work ethic.
en.wikipedia.org Its astronomical activities were mostly limited to timekeeping and observation of solar and stellar phenomena.
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