The relation between the statistical probability of atomic level population and the squeezing is studied by numerical calculations.

通过数值计算，讨论了原子能级布居的统计几率与压缩的关系。

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In this paper we discuss the approximations introduced in the average-ion model usually employed for level population calculations.

本文讨论了通常计算能级占据数时所用的平均离子模型中引进的近似。

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Policies are framed to limit to an acceptable level population growth through immigration, and to control the entry of foreign workers.

本处的政策旨在限制移居本港的人数，使所导致的人口增长维持在可接受的水平，并对输入外地劳工施行管制。

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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

"If people are not able to enhance their skills in various medical specialties, therefore they cannot provide the high level of health care and services that the population needs."

VOA: standard.2010.06.01

"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

Unlike the previous study that was more heavily weighted with minority participants and a wider range of education level, the ACS study population was more white and more likely to have a higher education level than the general population.

FORBES: The Smoking Gun: Women Catch Up To Men On Lung Cancer Risk

Two and a half million people died of Aids last year in Africa, you've got countries where people are living way below subsistence level, population levels are increasing and yet life expectancy is low.

BBC: News | BREAKFAST WITH FROST | Tony Blair interview

The reason is that widening replacement-level fertility means population growth is slowing down anyway.

ECONOMIST: Lower fertility is changing the world for the better