A generation ago, during a previous resource boom, African states set about building roads and railways. In few countries did this lead to prosperity.
因为早在前一代人资源繁荣时期，非洲国家就着手公路铁路建设，一些国家因此也确实走向繁盛。
Over the past few years China has completed more and more high speed railways.
过去几年，中国建成了越来越多高速公路。
Over the past few years China has completed more and more high speed railways.
过去几年，中国建成了越来越多高速公路。
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