Fifthly, we need to consider the effect on the local population.

第五，我们必须考虑对当地居民的影响。

《牛津词典》

This, in turn, has a major effect on their diet, leading scientists to speculate that the ability to learn population-specific hunting methods could be driving the animals' genetic development.

这进而对它们的饮食产生了重大影响，促使科学家们推测，学习特定种群狩猎方法的能力可能推动了这些动物的基因发育。

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Population bottlenecks can have the same effect.

人口瓶颈具有相同的效应。

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She explains that the strategy did not work as predicted because of what's called a population level effect.

VOA: standard.2010.03.22

"She would come down to our graduation ceremonies and it was incredible the effect she had on the entire population of the base, We all loved her!

VOA: standard.2010.05.15

"When you can't say for sure whether all the women in the advance provision group actually used the medication, then you're kind of looking at population level effect of a strategy, not the individual effect of a medication."

VOA: standard.2010.03.22

On January 1st China's FTA with ASEAN, the world's biggest by population, came into effect.

ECONOMIST: Regional economic integration has a long, long way to go

The economic effect of population decline will, in all probability, be severe, long-lasting, and evident soon.

FORBES: Is China Running Out Of Workers?

Ill-designed pension systems magnify the effect of population ageing by creating incentives for people to retire ever earlier.

ECONOMIST: Time to grow up | The