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所屬欄目:英漢雙解生物學

1. The reflex process inthe eye by which an image is focused on theretina. In humans,the eye at rest is focusedon infinity,with the lens and cornea flat-tened,To focus on a near object the ciliarymuscles contract,and the lens,being elas-tic,becomes more c ......(本文共 894 字 )     [閱讀本文] >>


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