come of age
成年，到達法定年齡或成人年齡
書面/口語·用于描述成年或成熟
英文釋義
to reach the age when one is legally recognized as an adult
例句
He came of age on his 18th birthday and could finally vote.
典故來源
源自中世紀法律，指達到法定成年年齡，通常為21歲或18歲。