setting-out of reservoir flooded line

例句：

1. 1.The team set out on a new project last week.
   上周，该团队开始了一个新的项目。
2. 2. They set out to find a solution to the problem.
   他们开始寻找解决这个问题的方法。
3. 3.The journey began at dawn and ended at sunset.
   旅行从黎明开始，到日落结束。