arrangement and combination

• 排列组合

arrangement and combination的用法和样例：

例句

1. Besides, the author understood the rule of negative multiplication completely and studied the problem of permutation and combination deeply.
   另外，萨玛瓦尔完全理解了负数的乘法法则，并对排列组合问题也有充分的认识。
2. Because of changes wrought by the ceaseless uniting and sundering of protein, every conceivable type of arrangement is produced.
   由于蛋白质不断结合分解的变化，各式各样的排列组合都产生了。