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巴西为什么要大量种植甘蔗？他们要那么多甘蔗，有什么用处？
巴西人简直太奇怪了，别人的耕地基本上都以种粮食为主，他们却大量种植甘蔗。巴西人为什么要大量种植甘蔗？他们到底有什么用处？
不可思议的科普31/71
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