A milestone is an important event in the history or development of something or someone. 里程碑
例：
He said the launch of the party represented a milestone in Zambian history.
他说该党的成立代表着赞比亚历史上的一个里程碑。
A milestone is an important event in the history or development of something or someone. 里程碑
例：
He said the launch of the party represented a milestone in Zambian history.
他说该党的成立代表着赞比亚历史上的一个里程碑。