英语释义
1. a stone serving as a milepost (see milepost sense 1)
2. a significant point in development
Graduating from college was an important milestone in her life.
3. a stone by the side of a road that shows the distance in miles to a specified place
4. an important point in the progress or development of something a very important event or advance
5. a stone by the side of a road showing the distance in miles to a given place
6. an important point in progress or development His discovery was a major milestone in scientific research.