唐朝的开始时期是我最感兴趣的，而唐朝是中国文明的一个新的高度。

The beginnings of the dynasty are the most interesting for me, and the Tang was a new height for Chinese civilisation.

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在人类文明的开始时期，人通过日常得到的食物营养品可以自己积累脂肪；

The dawning of civilization has enabled modern man to accumulate fat- through regularly available nourishment - at will;

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文章讨论了末次冰消开始时期青藏高原南部普莫雍错湖芯沉积反映的环境暖湿化以及原因。

This paper revealed a warm and humid environment during the initial stage of the last deglacial period in the Pumoyum Co Lake of the southern Tibet and analyzed several possible reasons.

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So I started to talk to the VCs and asking for $10 million at a very, very difficult time in Internet history.

就在互联网历史上最艰难的时期，我开始跟风险投资商接洽，向他们要1000万美元。

斯坦福公开课 - 百度CEO李彦宏演讲：全球最大搜索引擎的发展课程节选

We did that during the Great Depression, when it suddenly seemed like we really needed to do something.

是在大萧条时期开始实行的，因为当时我们突然发现,确实该做点什么了。

耶鲁公开课 - 金融市场课程节选

You know why focus on digital media were because in the wake of Columbine then we entered into a called period of moral panic, the moral panic is when you stop asking questions and start assuming you know the answers.

把关注点放在电子媒体的原因,是在科罗拉多可伦拜高中枪杀案之后,我们进入了一个叫做“道德恐慌“的时期，道德恐慌就是你不再质问,而是开始臆想你已经知道所有的答案。

麻省理工公开课 - 媒体、教育、市场课程节选