For once, the best technology that the world, working together, can offer is being introduced in Africa.
这一次,世界上合作开发并可以提供的最佳技术正为非洲所用。
It is still unclear whether domesticated cattle were tamed independently in northern Africa or introduced to the continent from southwest Asia.
目前还不清楚驯化的牛是在北非独立驯化的,还是从西南亚引入非洲大陆的。
All the recorded staple crops grown in western Africa were introduced from elsewhere, beginning, at some unknown date, with rice and yams.
西非所有从某个未知的日期开始记录的主要农作物都是从其他地方引进的,刚开始是种植水稻和山药。
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