ǰ ȣ( ) Ϸ ݴ밡 ˸ͽ ãƺٰ ڵ R,RS,RSC ȣ ֱ淡 Ϸٰ Ȥó ȸ غϴ ̤ ߰ǰ Ͽ ε ڳ̤̾Ƹ 20 ϰ̴ϴ ø갡 ȸ ִ ø() ϸ Ǵµ ̸ ϴ () ǰ̶ Ȱ? ǹ ߸Ͽ ɽ ̤
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