练习册

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    18.贫困、战争与暴力 poverty, war and violence

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    17.在农村地区　 in rural areas

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    16.喝到洁净的水

    have access to clean drinking water

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    15.地球上的人们 the people on earth

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    14.世界卫生组织　 the World Health Organization

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    13.卫生状况恶劣　 poor sanitation

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    12.饮水污染　 contaminated drinking water

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    11.三大公害 the big three

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    10.关于不同题目发表演讲

    　speak about different topics

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    9.可持续发展 sustainable development

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