It has served an extemporary apprenticeship; it wants no drilling; it never ranks in the awkward squad; it has no left hand, no deaf ear, no blind side.

它需要一个练习不用事先准备，张嘴就说的见习期。它不需要刻苦钻研，在那些愚笨的人从来就不具备这种本领；它是信手拈来的，对周围的一切洞若观火。