英语词汇sigma ring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	sigma ring
释义	sigma ring 【数学】σ环[亦作 σ-ring,sigma-ring]
随便看	actiums activable activate activated activated absorption activated alumina activated carbon activated carbons activated cathode activated complex activated cross-slip activated deposit activated diffusion bonding activated graft activated mine activated plow activated sintering activated sludge activated-sludge effluent activated-sludge process activated state activated support activated water activater activates

英汉双解词典包含483723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。