英语词汇“second category”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	second category
释义	second category second category [′sek·ənd ′kad·ə‚gȯr·ē] (mathematics) A set is of second category if it cannot be expressed as a countable union of nowhere dense sets.
随便看	rfov r.f.p. rf&p rf-p rfp rfpa rfpb rfpc rfpd rfpe rf-pecvd rfpef rf/pf rfpf rfpg rfpga rfpi rfpi actd rfpi-c2 rfpicc rfpi ldtoc rfpis rf pits rfpk rfpl

英语词典包含2567994条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。