random vibration environment

例句：

1. 1.The random selection of the team members is a surprise to everyone.
   团队成员的随机选择让每个人都感到惊讶。
2. 2. The weather forecast was completely random, so we decided to go for a hike in the park.
   天气预报完全随机，所以我们决定去公园里徒步。
3. 3. The random act of kindness by the stranger warmed the hearts of all who witnessed it.
   陌生人的随机善举温暖了所有目睹的人的心。