英语词汇30 sec怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	30 sec
释义	Examples: secant (of angle), written sec θ— 正割 US Securities and Exchange Commission (SEC)— 证交会 • 安全与交换委员会 • 美国证券交易委员会
随便看	extra licences extra light extra line extra loading extra local extra long extra-long staple extra long time extra low carbon extra-low dispersion extra-low dispersion lens extra low noise extra low voltage extra loyalty points extra luggage extra luxurious extra luxury extramarital extramarital affair extra-marital lover extramarital relationships extra meaning extra meeting extra members extra mile

英汉双解词典包含2273206条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。

secant (of angle), written sec θ—