Blindness affects about 45 million people around the world, mostly in poor areas.

失明影响着世界上大约四千五百万的人，(他们)大部分在贫穷地区。

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Over three-quarters of the world's poor live in rural areas, mostly dependent on agriculture.

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America's charter-schools are mostly in deprived areas, and most of the pupils they teach are black and poor.

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