“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	rescue dump resealing pressure research research method research octane number research reactor research rocket research ship resection resectoscope Resedaceae resedimentation resequent resequent fault-line scarp resequent stream reserpine reserve reserve aircraft reserve battery reserve buoyancy reserve cell reserved minerals reserved word reserves reserves-decline relationship

科学参考收录了103327条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。