| 单词 | factorial |
| 释义 | factorial adj, n (mathematics 数) (of the) product of a whole number and all those whole numbers below it 阶乘; 阶乘的; 因数的 factorial 5 (represented as 5!), ie the product of 5 4 3 2 15的阶乘（记作5!, 为54321的乘积）. |
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