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So in a town that's the size of new Haven with a population of let's say 100,000 people in just the immediate New Haven area, there might be 20 of these instances of very severe form of polio per year, 20 crippled children would result.
在一个像纽黑文这么大的城市里,大约有十万人口,生活在纽黑文地区的人当中,每年可能就会有二十人,感染到这种急性传染病,可能会导致二十个孩子残疾
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The problem with--there's a problem with gambling behavior because in a certain fraction of the population we have pathological gambling.
赌博行为有个特殊情况,在人群中总会有一小撮人,我们称之为病态赌博
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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。
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And so this is a substantial change in the interaction of a microorganism with a population, right?
所以这是微生物和人类,之间关系的一个巨大改变,对吧
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Now, the reason this condition always holds in ordinary mechanics is because you're never, in that case, concerned with a huge statistical population of particles where the disorder among them is an issue.
这个条件在力学中总是成立,这是因为在力学中,我们从来没有关注过大量粒子的统计行为，而对这些系统来说,无序是很重要的。
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You have to make those calculations and there are errors in that, but you come away with a population estimate of things like that.
你必须把这些都算进去,因为其中存在误差,但这样你会得出,整体人群摄取量的估算值
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You're not intervening with people, you're observing usually large numbers of people in a population.
不干涉他人生活,只是观察一个人群中的许多个体
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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
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Cells share signals with each other, and that leads to activation of a specific cell population if we're thinking about a vaccine that produces antibodies, that leads to activation of B-cells, immature B-cells, which do two things.
细胞与细胞之间存在信号传递,而这将激活特定的细胞群体,如果是一些能够产生抗体的疫苗,抗体将会激活B淋巴细胞,幼B淋巴细胞,使其发生两种变化
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