Floating population is a key population for HIV prevention.

流动人口是预防艾滋病的重点人群。

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To supporters, GM crops are a key part of the effort to sustainably provide food to meet a growing global population.

为满足日益增长的全球人口需求，需要付出努力，持续地提供粮食。对于支持者来说，转基因作物是这一努力的一个关键部分。

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The tourist increase is one key reason the city's population is down from 175,000 in the 1950s.

游客人数的增加是该市人口从20世纪50年代的17.5万人下降到目前人数的一个关键原因。

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Two are key: population and wealth.

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With population a key influence on the environment, UNFPA says the 1994 Cairo conference on population and development linked environmental protection to individual decision-making and human rights.

BBC: 'Shortsighted' world lets population swell

Another key trait marking the population's distinctive cultural identity is the use of an English-based creole vernacular known as Gullah.

CNN: African slave traditions live on in U.S.