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

VOA: standard.2010.05.10

If you wish to change sections, you may do so only with permission of the subject administrators because it's very important that those sections be kept at a small population.

如果你们想要改时间，你只能在课程管理主任允许,的情况下这样做,因为让课程的人数保持在比较少的水平,是很重要的。

麻省理工公开课 - 固态化学导论课程节选

Now you'd hope that it would be a small percentage of the population that would be affected by this but it's not.

尽管你希望只有很少一部分人,存在这个问题,但事实却不是如此

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

You find that the graphs for the men and the women, the orange and the yellow lines look pretty much the same, so there don't appear to be any gender interactions until you get out here, and that's a pretty small segment of the population.

图中黄色线代表男性,橙色线代表女性,两条线相当接近,除此之外,性别之间没有太大差异,这部分人群总体并不多

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选