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每轮遍历后，最大元素会"冒泡"到末尾
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The drone is palm-sized when folded and fits easily into a pocket. This model comes replete with 42GB of internal storage, so you can film your adventure or venture entirely uninterrupted. Its portability and compactness do not compromise its ability to capture high-quality video, either. As previously mentioned, the drone records 4k footage with a 60fps (frames per second) frame rate. DJI claims this drone will render your content in crisp, clear, highly defined detail.，更多细节参见17c 一起草官网
Alternative distribution strategies and business models。关于这个话题，搜狗输入法下载提供了深入分析