모든 콘텐�?기사)�?저작권법의 보호�?받는 �? 무단전재, 복사, 배포 등을 금합니다. If a grammatical basic principle that's added to 서툴�?is really a vowel �?and there is no other alternative apart from a vowel �?then that grammatical basic principle cannot be extra to 서툴�? ☑️ 궁금�?�