n. stone post at side of a road to show distances
n. a significant event in your life (or in a project)
n. 里程碑, 里程石, 里程标
1. Completing the project on time was a major milestone for our team.
按时完成项目对我们的团队来说是一个重要的里程碑。
2. Graduating from college is a significant milestone in a person's life.
大学毕业是一个人生活中的重要里程碑。
3. The company reached a milestone by achieving its highest sales this year.
该公司通过实现今年最高销售额达成了一个里程碑。