random

例句：

1. 1. The results were random and unpredictable.
   结果毫无规律可言。
2. 2. She decided to go to the beach at random.
   她决定随意去海滩。
3. 3. He was given a random number to pick from a hat.
   他从一个帽子里被随机抽了一个号码。