单词 | 在真空中 |
释义 | 〔meter〕The international standard unit of length, approximately equivalent to 39.37 inches. It was redefined in 1983 as the distance traveled by light in a vacuum in 1/299,792,458 of a second. See table at measurement 米:长度的国际标准单位,约相当于39.37英寸,在1983年被重新定义为光在真空中1/299,792,458秒内所经过的距离 参见 measurement |
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