Regional or national advertisers that market locally need to stress their local points of difference and why they're the best selection in a given market.

作为面向本地市场的地域性的和全国性的广告主，他们需要做的是强调本地市场的差异度和为什么他们是既定市场的最佳选择。

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Butbacteria and viruses breed fast, so natural selection hastime, within the spanof a human life, to make a difference.

但是细菌和病毒繁殖迅速，因此自然选择可以在短时间内发挥作用，使人们能够观察得到。

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But the difference is that they continually crop and refine their trial-and-error solutions-mimicking the way natural selection works in the wild.

但不同之处在于它们持续计算，并且精炼它们的反复试验方法，模拟在野外自然选择的方式来工作。

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Trials in which jury selection makes a decisive difference are rare, they believe: most cases are decided on the evidence.

ECONOMIST: American juries

The Commons education select committee had said there was no difference between that approach and selection by academic ability.

BBC: NEWS | UK | Education | School selection reduced slightly

Those mutations that make a difference to the operations of genes will be affected by natural selection.

ECONOMIST: The longest ��headache�� ever