Under natural drought condition, the density of stomata increased, but relative opening degree of stomata decreased.

在自然干旱条件下，梨树叶片气孔密度增大，而气孔相对开张度却变小。

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Even at the same relative opening degree, the coefficient of minor loss is different for different pipe diameters of valves.

不同管径的阀门，在同一相对开启度下的阻力系数不同。

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Anatomic construction, density and relative opening degree of stomata, stoma conductivity, transpiration rate, and photosynthetic rate of pear leaves of both irrigated and dry land were tested.

比较测定了水、旱地梨树的叶片解剖构造、气孔分布密度与相对开张度、气孔传导率、蒸腾速率以及光合速率。

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Does the relative opening of a singer's mouth in a choir signify difference in pitch?

WSJ: Book Review: The Cambridge History of Musical Performance

In scenes resembling a relative Christmas Day, lonely David will be opening packs of toilet tissues, large sacks of potatoes, cabbages, carrots and large boxes of Corn Flaks during the afternoon.

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But perhaps in answer to boss Tony Pulis's criticism of their defending at set-pieces in their opening day defeat at Bolton, Stoke handled any dead balls that came their way with relative comfort.

BBC: Stoke 3-2 Aston Villa