半群環(huán) semigroup: 半群; 半組archimedean semigroup: 阿基米德半群cancellation semigroup: 消去半群commutative semigroup: 交換半群conical semigroup: 錐形半群下載手機(jī)詞典可隨時(shí)隨地查詞查翻譯