“open ball”的概念、定义、翻译、参考文献-科学参考

单词	open ball
释义	open ball [`ō·pǝn `bȯl] ^MATHEMATICS In a metric space, an open set about a point x which consists of all points within a fixed distance from x.
随便看	docking block docking bridge docking keel dock landing ship dockyard Docodonta docosane docosanoic acid docosapentanoic acid doctor doctor bar doctor blade doctor knife doctor roll doctor solution doctor test doctor treatment document document alignment documentation document flow document handling document leading edge document mark document misregistration

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