生活在肯尼亚内罗毕基北拉贫民区的人民为一升水所花费用是美国普通公民所花的五倍。
People living in the Kibeira slum in Nairobi, Kenya, pay up to five times more for a litre of water than the average American citizen.
今天，地球上七分之一的人口生活在贫民区。
于是布莱克威尔医生在城里的贫民区为生活在贫困线以下的人们看病。
So doctor Blackwell opened an office in a poor part of the city to help people who lived under difficult conditions.
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