... 电气化铁路 electrified railway 浮沉振动 bouncing vibration 改建铁路 reconstructed railway ...
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Changes in the ions' vibration rate were measured by bouncing laser light off them.
依靠离子反弹的激光，离子振动频率的变化就能被测量出来。
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ECONOMIST: Scientists measure a few yoctonewtons for the first time
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