国际新闻
Clock ticking for leap second: Why timekeeping could change forever
来源: Al Jazeera – Breaking News, World News and Video from Al Jazeera · 发布于
Timekeepers add a leap second occasionally to keep our clocks and the Earth's rotation in tune. That could now change.
Timekeepers add a leap second occasionally to keep our clocks and the Earth's rotation in tune. That could now change.
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