21 ȸǿ ֵ غü ϱ ̴.
ȸ 2 ȸ繫ó Ҽӱ 21 ȸ غȸ( ± 繫) Ӱ غ Դ.
13 '21 ȸ ' ȸǿ 4 16Ϻ Ѵް ó ̴.
'ȸ' 2 2 ȸǿ Ͼ Ͽ ȸ ߱, ӿ Թ ȳ Ѵ.
'ȸ'2(缱 ) ȸǿ 缱 缱 缱 ȸ繫ó ϰ ؾ Ѵ.
'21 ȸ ' ȸǿ ã ǿ ߴ.
21 ȸ ȸǿ ϰ ڼ εȴ.
20 , ǿ Ǵ .
ȸǿ 99% () ϰ ̷ , ó ǿ Ͻ 1 ϸ, нϰų ߰ Ÿ ȸǿ 35000 ϰ , Ϸùȣ , ȸǿ ϼ εȴ.
21 ȸ ǿ غȲ ȸ繫 "̹ 21 ȸ غϸ鼭 ϰ ִ ڻ ִ Ȱϰ 縦 Ͽ ϴ 20 ȸ 1/3 Ͽ ϰ ִ" "ȸ繫ó 21 ȸ ȿ̰ ְ ̷ ֵ ϰڴ" ߴ.
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