They controlled for changes due to social and cultural factors to calculate how strongly natural selection is shaping these traits.

研究小组严格控制了社会及文化因素引起的差异，以便单纯研究自然选择对这些特征的选择性到底有多强。

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This paper introduces hydraulic vibration-exciting system for marble moulding machine, and pats forward rational selection method of vibration. parameter for the system controlled by rotary valve.

本文介绍了应用于再造大理石成型机的液压激振系统，并提出了应用转间控制的系统其振动参数的合理选择方法。

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The whole digit-controlled lathe of lower prices generally choose stepping drive unit price is higher, and the machine tool selection servo drive unit.

整台数控机床价格较低的一般选择步进驱动单元，而价格较高的机床选择伺服驱动单元。

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The selection committee is in turn controlled by party whips.

BBC: Q&A: What are select committees?

Many of Northern Ireland's Catholic grammar schools are owned by Catholic dioceses and so are controlled by the bishops who want to get rid of selection.

BBC: Edmund Rice Schools Trust to phase out academic selection