时代周刊选出年度十大发明：智能有趣！（组图）
TIME2016-12-07 14:39
9. Sweet Potatoes That Could Save Lives
9.能救人命的甜土豆
The key is biofortification, or cross-breeding locally grown sweet potatoes with versions rich in vitamin A, so that over time the crops naturally get better at addressing the deficiency.
生物强化或者说当地种植的甜土豆和富含维生素A的土豆杂交是关键，所以，慢慢作物越长越好， 弥补劣势。
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