短語詞組短語quotient near ring 商擬環(huán)right quotient ring 右分式環(huán)maximal quotient ring 極大商環(huán)left quotient ring 左商環(huán)maximal right quotient ring 極大右商環(huán)symmetric quotient ring 對稱商環(huán)left right quotient ring 左商環(huán)Gaussian quotient ring 高斯商環(huán)lf quotient ring lf 商環(huán) 返回 quotient ring