替换率——用来协调静止人口的总出生率级别。

Replacement rate — The level of total fertility that is compatible with a stationary population.

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在束缚水饱和度为零的情况下，三种类型岩石中以石灰岩的自吸采收率最高，其值比同等渗透率级别的砂岩高23%。

Among three types of rocks, at zero initial water saturation, imbibition recovery from chalk samples is the highest, about 23% higher than that from sandstone with similar permeability.

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员工流动率在级别低的职员中特别高。

Staff turnover is particularly high among junior grades.

《柯林斯英汉双解大词典》