走进甘肃天水麦积区南山花牛苹果基地，勉励“要加强品种保护和培育，优化种植方式，创新营销模式”；
* 时间复杂度: O(n²) 最好: O(n) 空间复杂度: O(1) 稳定: ✓
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Hans-Christoph Steiner
At the moment each hand sells for $12,000 (£8,800), but "we will be making it more affordable in the future," says Pan.