bell number in proper order
bell number in proper order
按正确顺序排列电话号码
以上为机器翻译结果，长、整句建议使用 人工翻译 。
-
The properties of Bell number in proper order are studied with the use of elementary method, some identities involving the sum of product of Bell number in proper order are obtained.
利用初等方法研究了有序贝尔数的性质，给出了关于有序贝尔数的一组恒等式。
youdao
更多双语例句