A couple of hours later I called back to see what they wanted me to do.
两三个小时后,我打电话问他们希望我如何讲。
I called back immediately. Linda Sue answered the phone and handed it to Pete.
我马上回了电话。琳达·休接了电话递给皮特。
B we eventually talked about our past and then she told me her dorm number and I called back, we chatted off and on as friends.
我们谈到了各自的过去,然后她告诉我她寝室的号码,然后我就打过去,从那以后,我们成了网上网下的好朋友。
The man called back, "Where can I hunt?"
VOA: special.2010.03.20
In 1957, they reformulated it and they called it the Standard & Poor 500, but I'm using their long theories, back to 1871, so I can't call it the 500; I'm calling it the Composite.
在1957年,他们将其重建,并命名为标准普尔500指数,但这里用到的是1871年发布的理论,所以不能称之为500,我称之为综合指数
It's a more powerful method than something called a cross-sectional study, and I'll come back in a later lecture and talk about these in more detail, but a cross-sectional study means you're taking a snapshot of a population of people at one time.
这种方法比所谓的横断面研究更加有效,我将在以后的课中,再仔细讨论这个问题,但横断面研究是指,你一次记录下一群人的状况
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