적성은 원래 고려, 조선시대에는 파주, 연천과는 별도�?행정구역이었�? 삼국시대에는 백제와 고구려의 칠중현이었으�?신라 경덕�?�?중성현으�?개칭하고, 고려 �?적성현으�?고쳤�? If a grammatical principle that is definitely extra to 서툴�?is usually a vowel �?and there is no other selection in addition to a vowel �?then that grammatical basic principle can not be included to 서툴�? Successfully Submitted (Awaiting Approval)