muKK [mu] /mu/發音名詞1希臘字母μThe symbol mu is the twelfth letter of the Greek alphabet.符號μ是希臘字母中的第十二個字母。2微、百萬分之一科學用語In physics, mu often stands for the prefix meaning one millionth.在物理學中,μ常代表百萬分之一這個字首。3畝The family farms about three mu of land outside the village.這家人在村外耕種大約三畝地。