For the retail car owner, it's likely to be an evolutionary change.

对于零售车主，很可能是一个渐进的变化。

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But many rejected natural selection, preferring other kinds of mechanisms to drive evolutionary change.

但是，许多人拒绝自然选择理论，他们更喜欢驱使生物演化式变化的其他各种机制。

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Work done a couple of years ago by Mark Pagel of Reading University, in England, suggests that about a fifth of evolutionary change happens jerkily at around the time new species form.

英格兰雷丁大学的Mark Pagel数年之前的研究表明在新物种形成时大约1/5的进化上的改变是“不平稳的”。

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For many products -- TVs and the iPod, for example -- the leap to color displays represented an evolutionary change.

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He had long assumed them to be an incremental and selective evolutionary change that began with agriculture and the consumption of grains.

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As a result, we try to ring out the risk by looking for an evolutionary change model that skips over the regressive stage.

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