The dashed circle shows the current best distance. As the algorithm finds closer points, the circle shrinks, which causes more subtrees to fail the "could contain a closer point?" test and get pruned. The search usually gets cheaper as it progresses.
产品质量与安全问题也在侵蚀品牌信誉。黑猫投诉平台显示，九号电动车累计投诉量达 4166 件，电机故障、电池虚标等问题频发；2024 年国家市场监督管理总局抽查中，7 批次产品不合格，山东省抽检还发现其淋水涉水性能不达标。海外市场同样丑闻不断，2025 年 3 月，美国消费品安全委员会因折叠装置故障召回 22 万辆 Segway 滑板车，这已是四年内第四次海外召回。，详情可参考爱思助手下载最新版本
important to use the tool as an aid, not a replacement for the developer's。业内人士推荐heLLoword翻译官方下载作为进阶阅读
But some question whether this expensive technology is worth it.