The set of points surrounding a specified point,each of which is within a certain,usually small distance from the specified point
英
美
- 周围的点的集合，其中每个点离定点在一定的，通常是很小的距离内
- 今日热词
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- 深远海浮式风电平台 - deep-sea floating wind power platform
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- 京雄高速公路 - Beijing-Xiongan expressway
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- 农业及相关产业增加值 - the added value of agriculture and related industries
