[ fæk'tɒ:riәl ] COCA词频 23162 a. 因子的, 阶乘的, 代理商的 n. 阶乘 [计] 阶乘 n. the product of all the integers up to and including a given integer a. of or relating to factorials 复数: factorials 英汉双解字典由 ECDICT 提供