英语词汇“leap second”的翻译、意思、用法、释义-英汉双解词典-修远网

单词	leap second
释义	leap second n ① 闰秒(因地球自转速度的误差需要校准时间,于七月一日上午八时五十九分,经过六十一秒之后对准九时)
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