The accuracy of the clock is within fractions of a microsecond a day of the international time standard kept by the International Bureau of Weights and Measures in France.是什么意思_The accuracy of the clock is within fractions of a microsecond a day of the international time standard kept by the International Bureau of Weights and Measures in France.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句