Objective To investigate the genetic polymorphism of7Y-STR loci and haplotypes and analyze their population difference.

目的调查y染色体7个STR位点及单倍型的遗传多态性并分析其群体差别。

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The Polarization and Population difference of the three-level atom, driven bya microwave field and interacted by a strong short laser pulse, is studied by me-ans of semiclassical theory in the paper.

本文采用半经典理论方法研究了在短脉冲作用下，被共振微波场驱动的三能级原子极化强度振幅和粒子数差随时间的变化。

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"It may be a genetic difference or a slight difference in the [bee] population" -or something else entirely.

也许是基因的不同或则是不同种群之间的细微差别，或则完全是别的其它原因。

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"There may be either a new cause for gastric cancer in that population or perhaps some difference in their Helicobactor Pylori infection that's contributing to a new risk for gastric cancer."

VOA: standard.2010.05.12

Making some neurologists nervous is the fact that the study was performed in Russia, where Alzheimer's drugs aren't used as often as in the U.S. This or some other undiscovered patient population difference might tend to magnify the difference between drug and placebo, some neurologists say.

FORBES: Magazine Article

Interprovincial immigration was 100 times more likely, after adjusting for income difference and population sizes.

ECONOMIST: Good fences

Rarely addressed in the context of climate change, future population trends could make the difference between success and failure in the long-term balance of human activities, atmosphere, and climate.

UNESCO: Climate change