3. 步长逐渐减小，最后步长为1时就是普通插入排序
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Grammarly also detects all types of mistakes, including sentence structure issues and misused words. It also gives you suggestions on style changes, punctuation, spelling, and grammar all are in real-time. The free version covers the basics like identifying grammar and spelling mistakes。关于这个话题，safew官方版本下载提供了深入分析
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