Genetic data can show that different populations had historical interactions.

遗传数据能显示不同座头鲸种群之间曾有过互动历史。

This means that when a food web is altered, it has different effects from different populations.

这意味着当食物网被改变时，不同的种群会产生不同的影响。

" We need to find better ways of reaching different populations at all ages, " she says.

她表示，“我们需要找到更好的方法，以接触到不同年龄段的人群。

These reference populations contain SNPs known to exist more frequently in different modern populations in the world.

这些参考人群包含了世界上不同现代种群中更为常见的单核苷酸多态性。

The variation in bird beak color within a species is often used to identify different populations from each other.

物种内部鸟喙颜色的变化通常用于识别彼此不同的种群。

Because here's the bit of serendipity: he'd actually been studying the cold tolerance of different populations of these lizards.

实际上他一直在研究不同种群蜥蜴的耐寒性。

When a testing company receives your sample, they compare your pattern of SNPs to different reference populations in their database.

当测试公司收到您的样本时，他们会将您的 SNP 模式与数据库中的不同参考人群进行比较。

As a young child, I hated different population groups.

小时候， 我讨厌不同的人群。

Those are totally different populations  that never interact with each other.

这些是完全不同的群体，彼此之间从不互动。

Another important population statistic is the birth rate for different populations.

另一个重要的人口统计数据是不同人口的出生率。

On the whole, the study's findings support the hypothesis, but further research is needed to validate the results across different populations.

总的来说，这项研究的发现支持了这一假设，但需要进一步的研究来验证不同人群的结果。

After all, they are very different biologically, they have different risk factors, and they affect very different patient populations.

毕竟， 它们在生物学上非常不同，具有不同的风险因素，并且影响非常不同的患者群体。

So we're reaching a point, there's been all kinds of challenges before, with the complexity of studying different populations.

所以我们已经到达了这样一个阶段， 之前存在着各种各样的挑战，研究不同人群的复杂性。

Different populations may also be exposed to health risks resulting from their physical environments, like the neighborhood they live in.

不同的人群也可能因他们的物理环境（例如他们居住的社区）而面临健康风险。

We still have about 25,000 polar bears spread across the Arctic, split into 19 different populations in Canada, Russia, Norway, Greenland and Alaska.

目前在北极地区仍分布约有 25，000 头的北极熊，它们分成 19 个不同的种群，分布在加拿大、俄罗斯、挪威、格陵兰以及阿拉斯加州。

As such, different populations of killer whales have had to learn different hunting techniques in order to gain the upper hand over their local prey.

如此，不同种群的虎鲸不得不学习不同的狩猎技巧，以便在追捕当地猎物中占据上风。

So now let's visualize how big our hypothetical global city would have to be according to the different population densities that we have been discussing.

那么现在让我们想象一下，根据我们一直在讨论的不同人口密度，我们假设的全球城市应该有多大。

Again, different people react to money differently, and I think employers need to start thinking about different populations and what they might need.

同样，不同的人对金钱的反应不同，我认为雇主需要开始考虑不同的人群以及他们可能需要什么。

One hypothesis states that bowheads might be singing so many songs because different populations are mixing together and bringing all their different songs to the mix.

有一种假设认为，弓头鲸会唱这么多歌，是因为不同的鲸群在融合到一起，要把所有它们不同的歌曲融合到一起。

And when males from different populations are feeding within earshot, phrases are often exchanged, maybe because new songs make them more attractive to breeding females.

当来自不同种群的雄性在听力范围内进食时，它们经常会交换短语，这可能是因为新歌让它们对正在繁殖的雌性更具吸引力。