英语词汇“first 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	first category
释义	first category first category [′fərst ′kad·ə‚gȯr·ē] (mathematics) A set is of first category if it is a countable union of nowhere dense sets. A set S is of first category at a point x if there is a neighborhood of x whose intersection with S is of first category.
随便看	energy from biomass and waste energy from waste energy from waste association energy future coalition energy future holdings energy futures trading research energy gap energy-giving energy governance and capacity initiative energy grade line energy gradient energy grants credit scheme energyguide energy guide label energy harvesting energy harvesting devices energy head energy healing energy hedge fund center energy heel energy helicity index energy ideas clearinghouse energy imbalance market energy imbalance service energy improvement loan program

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。