| 释义 |
factorial/fækˈtɔ:riəl/ n. & adj. Math. 【数】 ●n. 1 the product of a number and all the whole numbers below it 阶乘 factorial four 4 的阶乘 = 4 × 3 × 2 × 1 (symbol! as in 4! 阶乘符号为！如 4! 为 4 的阶乘) 2 the product of a series of factors in an arithmetical progression 阶乘积 ●adj. of a factor or factorial 阶乘的，因数的 □ factorially adv. |