虽然你我都知道hour是什么意思，但在发明这个词的年代，人们还没有时钟，hour并不完全指一段时间的长度，而更像是一天当中的某个时间点。
While you and I know what an hour is, the people who invented the word had no clocks and for them an hour was not so much a length of time as a milestone through the course of the day.
但是，单单自动删除电子邮件和电子文件，而没有清除邮件和文件下潜藏的信息，这样的文件保留政策并不完全合理。
A document retention policy that includes automatically deleting emails and electronic files, without also wiping the underlying data in those emails and files, is, however, simply not rational.
我们都知道多数世界地图并不完全准确。首先，非洲比看上去要大的多，而格陵兰岛根本就没有那么大。
We all know most maps of the world aren't entirely accurate. For starters, Africa is way bigger than it looks, and Greenland isn't nearly so vast.
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