모든 콘텐�?기사)�?저작권법의 보호�?받는 �? 무단전재, 복사, 배포 등을 금합니다. If a grammatical basic principle that is certainly included to 서툴�?is usually a vowel �?and there is no other choice in addition to a vowel �?then that grammatical theory cannot be included to 서툴�? 인공지�