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18Ⱓ ü, īǶ, ȸ ӿ, , ȸ پ Ŀ ڱ ȸκ ذ η ȥ ð . ϰ ȸ縦 ѱ? ϰ Ȱ ڽ ƮͿ α ø ̱ ε , ٲ ο Ǿ. Ŀ å ۿ 츮 뽺 ָ . 츮 ο ̷ Ѵ. ȸ縦 ϰ ִ°? ƴϸ ϰ ִ°?
̱ 츮 忡 ݵ ۿ ã ڽ ġ ̰ ϰ ŻٲŰ å̴. ش ݵ ϰڴ١ ߴٸ, ã ٴϰ ִ ȸ翡 ġ ̴ ϡ ϸ ȴ. ̹ ˰ ִ ΰ衯 Ȱϰ(θ), õ ձ Ȯϰ(), ü Ұ Ư ߰(μ), ϴ ýۡ ν() 츮 ϴ ̷ ִ. ϸ ϸ ȸ Ҹǰ ̴ ʶ ϰ ɱ η ̶, å ƴƴ ڽ ġ ̴ ذǴ 忡 Ƴ ִ ⡯ ߰ ̴.