The environmental problem is one of the most serious social problems that human beings are confronted with in history.
环境问题是人类有史以来面临的最严峻的社会问题之一。
Arsenic pollution is becoming an more and more serious environmental and social problem. Now man-made pollution is the most severe.
砷污染越来越成为一个严重的环境问题和社会问题，目前最为严重的正是人为的污染。
A high divorce rate and unstable families are considered a serious social problem, because the family, as the most basic unit of society, affects many aspects of social well-being.
高离婚率和不稳定的家庭关系通常被认为是严重的社会问题，因为作为社会最基本的组成单位，家庭影响到社会各个方面。
A high divorce rate and unstable families are considered a serious social problem, because the family, as the most basic unit of society, affects many aspects of social well-being.
高离婚率和不稳定的家庭关系通常被认为是严重的社会问题，因为作为社会最基本的组成单位，家庭影响到社会各个方面。
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