随机抽样调查

例句：

1. 1.The lottery is a form of random selection.
   彩票是一种随机选择的方式。
2. 2. He decided to choose a random number for the lottery.
   他决定为彩票随机选择一个号码。
3. 3. The results were random and unpredictable.
   结果随机且不可预测。