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μƒˆλ‘œμš΄ μ•Œκ³ λ¦¬μ¦˜μ„ ν†΅ν•΄μ„œ λ…Έμ΄μ¦ˆκ°€ λ°œμƒν•˜λŠ” 원인과

λ‹€μ–‘ν•œ 경둜λ₯Ό μ •ν™•ν•˜κ²Œ μΆ”μ ν•˜λŠ”κ²Œ κ°€λŠ₯ν•΄μ‘Œκ³ 

μ΄λŠ” 였λ₯˜ν•΄κ²°μ— μ•„μ£Ό μ€‘μš”ν•œ κΈ°λŠ₯이라 ν•œλ‹€