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.
有太多的贫民生活在十分拥挤的条件下。
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.
公立学校不安全且过于拥挤，缺乏知识经济条件下教育所必需的资源。
Unsafe, overcrowded public schools, which lacked the resources necessary for education in a knowledge economy; and
在坟址规划阶段，需要考虑到必要的安葬空间，尤其在拥挤的条件下。
The necessary space for burial should also be considered at the site planning stage, particularly in crowded conditions.
大规模霍乱暴发主要原因贫穷，战争和自然灾害，迫使人们生活在拥挤的条件下，没有足够卫生设备。
The risk of a mass cholera outbreak is highest when poverty, war or natural disasters force people to live in crowded conditions without adequate sanitation, according to the Mayo Clinic.
目前城市物流运输要解决的迫切问题是如何在日益拥挤的城市交通条件下提高运营效率，降低由于交通拥挤给企业带来的运输成本增加。
It is urgent to resolve the problems of the reduction of transportation efficiency and the increase of operation cost in logistics under traffic congestion.
目前城市物流运输要解决的迫切问题是如何在日益拥挤的城市交通条件下提高运营效率，降低由于交通拥挤给企业带来的运输成本增加。
It is urgent to resolve the problems of the reduction of transportation efficiency and the increase of operation cost in logistics under traffic congestion.
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