Fertility, , measured by the average number of children that would be born to a woman over herlifetime, is declining across the world but the population continues to rise as rates remain high.
生育率通过女性一生生育孩子的平均数量来衡量。全球女性的生育率正不断下降，而全球人口还在不断增加，这是因为人口出生率依旧很高。
Fertility, measured by the average number of children that would be born to a woman over her lifetime, is declining across the world but the population continues to rise as rates remain high.
生育率通过女性一生生育孩子的平均数量来衡量。全球女性的生育率正不断下降，而全球人口还在不断增加，这是因为人口出生率依旧很高。
The new registration rates of type 2 diabetes mellitus patients with pulmonary tuberculosis were calculated based on new registry number and average population of every year.
根据各年新登记数和天津市各年平均人口数，计算出2型糖尿病并发肺结核病患者的新登记率。
To undertake a systematic random sampling, one needs to know the total number of households, the average number of children under 5 years of age in a household, and the total population.
要进行一次系统随机抽样，必需知道人群中的家庭总数，平均每户家庭5岁以下儿童的个数，以及总人口。
With the increase of the average photon number of the coherent light field, the oscillation frequency of the atomic population inversion increases correspondingly.
随相干光场平均光子数的增加粒子数反转的振荡频率增大；
With the increase of the average photon number of the coherent light field, the oscillation frequency of the atomic population inversion increases correspondingly.
随相干光场平均光子数的增加粒子数反转的振荡频率增大；
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