Since there is a strong correlation between these variables and a country's wealth, they controlled for GNP per head by measuring whether it alone accounted for the difference in mating strategy.
由于这些指标与一个国家的财富密切相关，他们以人均国民生产总值为控制变量来看它是否能够单独解释择偶策略的差别。
If mating anchorages and stretching devices are selected carefully, and tensile stress and elongation are controlled, the unbonded prestressing will certainly meet its quality requirements.
本工程注意选择配套锚具及张拉设备，控制张拉应力及伸长率，使无粘结预应力达到质量要求。
And since they are behaviours rather than structures, and thus controlled by the brain, they may be part of the mating mind.
而且它们都是行为而不是结构，因此是由大脑控制的，也许还是寻偶想法的一部分。
And since they are behaviours rather than structures, and thus controlled by the brain, they may be part of the mating mind.
而且它们都是行为而不是结构，因此是由大脑控制的，也许还是寻偶想法的一部分。
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