cap·stone
noun/ˈkæpstəʊn/
/ˈkæpstəʊn/
- a stone placed at the top of a building or wall
拱顶石；压顶石 - (especially North American English) the best and final thing that somebody achieves, thought of as making their career or life complete
（使事业等臻于圆满的）顶点 - This award is a fitting capstone to his career.
这个奖项是他职业生涯的一个顶峰。
- This award is a fitting capstone to his career.