Studied on the relationship between leaf area composition of population and photosynthetic production of rice at middle growth stage.

通过密肥试验，研究水稻生育中期群体叶面积组成与光合生产的关系。

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The data were weighted to ensure that the sample's composition reflects that of the actual U.S. population according to U.S. Census figures.

调查根据美国人口普查的数据进行加权处理，以确保样本组成能够代表美国实际人口组成。

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Malignant spread of AIDS has changed the composition of the population in some countries.

艾滋病的恶性蔓延已经改变了一些国家的人口构成。

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The composition of our ethnic population and also the difficulties presented by our geographical terrain make communication and development difficult.

CNN: ASIANOW - TIME Asia | Interview: Foreign Minister Win Aung - Page 2

People choose different specialties and the number of males or whites or whatever choosing an occupation usually differs from the overall composition of the U.S. population.

FORBES: America's Male Only Child Policy?

Before long, the Employment Equity Bill, passed in August but not yet implemented, will force all but the smallest firms to submit annual reports to show that they are trying to make the racial and sexual composition of their workforce match that of the local population.

ECONOMIST: South Africa