N-COUNT
里程碑;重大事件;重要階段
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...
他說該黨的創立是贊比亞歷史上的一個里程碑。
Starting school is a milestone for both children and parents.
對于孩子和家長而言，開始上學是一件大事。