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並前往https://www.npr.org/2021/03/29/982395425/scientists-get-closer-to-redefining-the-length-of-a-second

Scientists Get Closer To Redefining The Length Of A Second

Atomic clocks, which look like a jumble of lasers and wires, work by tapping into the natural oscillation of atoms, with each atom "ticking" ...

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