翻译和例句：
200 millionUS physicists have made a clock so accurate* that it will never gain or lose a second in more than 200 million years. The clock works even better than the officialatomic clock(原子钟) used ……
the world’s first space-based cold atomic clock system (冷原子钟组). It will provide the most precise (精确... atomic clock system (冷原子钟组). It will provide the most precise (精确的) time! After ……
the global time, known as the atomic time (原子钟时间). This is the timekeeping that’s used for every ……
摘自： Leaping in time to keep up with Earth[SOMETIMES we wish that we could have more time. The good news is that this year will be longer than the previous! Although don’t get excited just yet, 21世纪学生英文报·初三版]
Institute of Standards and Technology.UTC is based on atomic clocks (原子钟). These clocks produce a kind... second, which then defines one second in terms of UTC. UTC is based on atomic clocks (原子钟 ……
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