1.N-SING 单数名词 成熟;发达 When something reaches an important stage of development and is accepted by a large number of people, you can refer to this as its coming of age .

【搭配模式】：with supp

...postwar Germany's final coming-of-age as an independent sovereign state.战后德国作为独立主权国家的最终成熟

2.N-SING 单数名词 成年 Someone's coming of age is the time when they become legally an adult.

【搭配模式】：with poss

...traditional coming-of-age ceremonies.传统的成年仪式