N-COUNT
里程碑;重大事件;重要阶段
A milestone is an important event in the history or development of something or someone.
例句
He said the launch of the party represented a milestone in Zambian history...
他说该党的创立是赞比亚历史上的一个里程碑。
Starting school is a milestone for both children and parents.
对于孩子和家长而言，开始上学是一件大事。