When something matures, it reaches a state of complete development. (某物) 长成
adjective [原级] 成熟的；到期的
He has matured a great deal over the past year. 经过过去这一年，他成熟了许多。
verb [vt. 及物动词] 成熟；到期（mature 的过去分词）
Her responsibilities matured her at an early age. 她肩负的责任使她早熟.
