网站首页 汉语 德语 英语
A topological space together with a metric defined for all pairs of points of the space.
Early 20th century; earliest use found in Transactions of the American Mathematical Society. After German metrischer Raum.
礼仪网英汉双解词典包含236457条英汉翻译词条,涵盖了常用英语单词及词组短语的翻译及用法,是英语学习的必备工具。