- 비말은 비오일성(기름입자가 아님)이므�? 오일 성분�?차단능력은 크게 중요하지 않다. If a grammatical basic principle which is included to 서툴�?is actually a vowel �?and there's no other choice other than a vowel �?then that grammatical theory can not be additional to 서툴�? It really is inc