Positive control of the blood pressure, selection of appropriate anticoagulant and protection of RRF have important clinical significance.

积极控制血压、选用恰当的抗凝方法以及保护RRF有着重要的临床意义。

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The human population exploded and without natural selection pressure, fecundity in the types economic activity flourished.

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Of course, low genetic variation means that selection pressure is higher.

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This creates a selection pressure which drives the genes through the population, as the offspring of wild flies die more often than those of engineered or hybrid flies.

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