最后一次冰川作用的漂浮物沉积在最近的其中一个地质时期——更新世，这段时期从180万年前持续到1万年前。

The drift of the last glaciation was deposited during one of the most recent epochs of geologic time, the Pleistocene, which lasted from 1.8 million to 10,000 years ago.

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这段时期被他们称为“枫树山”。

That's when they call Maple Hill.

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甚至许多熟读这段时期历史的人都不知道，这也是一场编写代码者和破译代码者之间的战争。

It was also, and this is unknown even to many people well read about the period, a battle between those who made codes and those who broke them.

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And, during the time of his interactions with Thompson and Rutherford, he got to thinking about a way to explain the observations of Rutherford.

通过在这段时期,和汤姆逊及卢瑟福的交流，他想到了一个办法,来解释卢瑟福的观察。

麻省理工公开课 - 固态化学导论课程节选

This is the present value of $1 in one time period, which I'm taking to be a year.

这就是一美元在一段时期内的现值,我只是将一美元持有一年

耶鲁公开课 - 金融市场课程节选

Some time around this period of time,in early Christianity, somebody got the big idea, "Hey,let's cut up the scroll into pages, and sew the pages together. And then,put it all in a book.

大概在这段时期，在早期的基督教里，有人想出了一个好主意，即把书卷断成张页，并用线一张张连起来使之成书。

耶鲁公开课 - 新约课程节选