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
이 조약에 서명한 가맹국들은 서로 협력해야 합니다.i joyake seomyeonghan gamhaenggukdeureun seoro hyeobryeokhaeya hamnida.The member nations that signed this treaty must cooperate with each other.