对目前生活在拥挤条件下的人们来说，洁净水和安全的卫生条件至关重要。

Clean water and safe sanitation are critical for the people now living in crowded conditions.

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有太多的贫民生活在十分拥挤的条件下。

Too many poor people are living in overcrowded conditions.

《牛津词典》

洪水和死水容易孳生蚊虫，在人员拥挤的条件下和临时住所中，可加剧个人和群体染病的危险。

Flooding and stagnant water will create favorable conditions for the mosquito vector and heighten epidemic risk for individuals and communities in overcrowded conditions and temporary shelters.

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