“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	double-current signaling double cusp double-cut file double-cut planer double-cut saw double decomposition double density double-diffused transistor double diode double-diode limiter double distribution double-doped transistor double dot halftone double-doublet antenna double drift double drill column double-drum hoist double ebb double electron excitation double-ended ferry double-ended Q machine double-entry method double exposure double-exposure holographic interferometry double-face satin

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。