random polymerization

例句：

1. 1. The random selection of the team members was based on their performance.
   队员的随机选择是基于他们的表现。
2. 2.The random walk in the park is a popular activity for many people.
   在公园里随意漫步是许多人喜欢的活动。
3. 3. The randomness of the weather can make it difficult to plan outdoor activities.
   天气的随机性使得计划户外活动变得困难。