SHIRLEY GRIFFITH: In South Africa, Mthuli Ncube is the director of the entrepreneurship institute at the University of the Vitwatersrand.

雪丽·葛里菲兹：在南非，穆斯里·努彼是维特瓦特斯兰大学创业学院院长。

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"We have achieved political democracy but not yet economic democracy for all, " says Mthuli Ncube, the African Development Bank's chief economist and a native South African.

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"It's a call to say 'look, please invest in Africa, there are good returns, ' " says Mthuli Ncube, chief economist and vice president of the African Development Bank.

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