/eɪdʒ ʌv riːzəʊ/ – Phrase
Definition: Tuổi trưởng thành, tuổi lý trí.
A more thorough explanation: the time in a person’s life at which they are held responsible for knowing right from wrong; the age at which a person is considered able to manage his or her own affairs or be responsible for certain acts
Example: The Catholic church actually believes that the “age of reason” occurs around age seven.