主道

例句：

1. 1. The main road leads to the city center.
   主路通往市中心。
2. 2. The main goal of the project is to improve efficiency.
   该项目的主要目标是提高效率。
3. 3. The main reason for his success was his hard work.
   他成功的主要原因是他的努力工作。