Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
의재필선은 상황에 맞는 행동을 강조합니다.uijaepilseoneun sanghwang-e matneun haengdong-eul gangjohamnida.The principle of appropriateness emphasizes actions that fit the situation.