small cesium clock 小铯钟
Two years later, in seventeen fifty-seven, he produced a small clock that he could hold in his hand.
VOA: special.2010.07.14
Smartphones prominently display the time and are already in our back pockets, so it can seem redundant to also strap a small clock to our wrists.
CNN: More than a watch: Apple's entry into wearable tech
The probes also contain a small atomic clock.
ECONOMIST: GPS jamming
Chen was relishing the renewal of his apartment lease, normally a mundane affair but currently no small feat in Beijing as the clock ticks toward the start of the Olympic Games on August 8.
CNN: Beijing journal: One lucky tenant
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