核心的瓶颈首先在于精度问题。目前技术虽然在不断进步，但在打印精细结构或大尺寸零件时，依然难以达到高精度装配所需的公差要求及优秀的表面质量要求，这直接导致了打印件难以直接作为最终功能部件使用。
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，这一点在safew官方版本下载中也有详细论述
Scrum和Kanban是两种最流行的敏捷框架，各有其适用场景。，推荐阅读WPS官方版本下载获取更多信息
int n1 = mid - left; // 左子数组长度