random theory

例句：

1. 1.The results were random, so we can't be sure of the outcome.
   结果随机，我们无法确定结果。
2. 2. The decision was made by a random selection.
   这个决定是通过随机选择做出的。
3. 3. She decided to take a random route home from work.
   她决定下班后走一条随机路线回家。