北京大学一间 4 0 m2 的简陋实验室里 ,我国科学家最近首次利用原子冷却技术实现原子喷泉 :数千万个原子犹如泉水一样瞬间被喷出 1～ 2 cm高……这不仅意味着中国人研究原子激光成为可能 ,而且标志着我国已基本掌握研制原子钟的核心技术 ,中国人把“时间”掌握在自己手里已为期 In a shabby laboratory of 40 m2 at Peking University, the first time our scientists have used atom cooling technology to realize atomic fountains: tens of millions of atoms are ejected as high as 1 ~ 2 cm instantaneously as spring water ... This not only means that Chinese It is possible to study atomic lasers, and it shows that our country has basically mastered the core technology of developing atomic clocks. The Chinese people hold the “time” in their own hands