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1.3.3 ɾ²Á¤Îɽµ­Ë¡

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(car '(1 2))
     ⇒ 1

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(third '(a b c))
     → (car (cdr (cdr '(a b c))))
     ⇒ c

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(make-sparse-keymap) ≡ (list 'keymap)