arrangement and combination的用法和样例：
例句
- 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。 - 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。
