记住，当时许多动物物种的活动范围是不同的，所以所有这些动物实际上都生活在那个地区。

Remember that the ranges of many animal species were different back then, so all these animals actually lived in the region at that time.

youdao

当时是早上7点，是高峰期，所以交通很拥堵。

It was 7 a.m.—rush hour—so there was much traffic.

youdao

所以当时的看法是，那些黑点实际上是别的东西，比如其他行星经过太阳时留下的阴影。

So the opinion was the spots were actually something else, like shadows of planets crossing the Sun's face.

youdao

So I had classmates from Hawaii and Klamath Falls, Oregon So you were in the situation.

所以我的同学中有来自夏威夷的,来自俄勒冈州克拉马斯福尔斯市的,所以当时在那样的形势下。

普林斯顿公开课 - 人性课程节选

You have a very, very changing demographic situation in the American South and its political culture has to respond to that.

你可以想象,当时的美国南方,人口流动是非常厉害的,所以当时的政治文化必须做出相应的调整

耶鲁公开课 - 美国内战与重建课程节选

So identity, national identity is very complex, and we talk about the war--this is, it's a sparkling account.

所以说身份,国家身份在当时很复杂,然后我们谈起这场战争,这是一个很有话题的事

耶鲁公开课 - 1871年后的法国课程节选