People in western Africa did not develop staple crops that they stopped cultivating once rice and yams were introduced, that 后面全是修饰staple crops的,翻译过来就是,美国西部并没有形成(一旦大米和山药引进就停止种植的)主要作物
People in western Africa did not develop staple crops that they stopped cultivating once rice and yams were introduced, that 后面全是修饰staple crops的,翻译过来就是,美国西部并没有形成(一旦大米和山药引进就停止种植的)主要作物
People in western Africa did not develop staple crops that they stopped cultivating once rice and yams were introduced, that 后面全是修饰staple crops的,翻译过来就是,美国西部并没有形成(一旦大米和山药引进就停止种植的)主要作物