Botswana has a small population, about two million, but a very big HIV prevalence rate.

VOA: standard.2010.05.10

But you can imagine the inability to do that in a big population study with thousands and thousands of subjects, so we have to rely on data like this.

但你们可以想象在一个大样本研究中,不可能对数以千计的研究对象做这种培训,所以我们需要依靠像这样的数据

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Either there will be nobody there or more likely there will be not a very big population, and it's not very tough, and they could be easily brushed aside.

所以要么那个地方没有人烟,要么就是人口稀少的部落,并不是很顽强,很容易就能被军队驱逐

耶鲁公开课 - 古希腊历史简介课程节选

Because nutrition is going to be one of the big problems of your generation; how to have enough nutritious food for the population as it grows.

因为营养,对你们这一代人是个大问题,怎样才能确保食物的质和量,能够满足日益增长人口的需求

耶鲁公开课 - 生物医学工程探索课程节选