aleatory

例句：

1. 1. The lottery is a game of aleatory chance.
   彩票是一种随机机会的游戏。
2. 2. The outcome of the experiment was aleatory.
   实验的结果是不可预测的。
3. 3.The weather forecast is aleatory, so be prepared for any sudden changes.
   天气预报是随机的，所以做好随时应对任何突然变化的准备。