二、视网膜的结构和两种感光换能系统的英文

structural elements of the retina and photosensory systems

• 二:    two
• 视网膜:    retina; retin-; re ...
• 的:    4次方是 The fourth po ...
• 结构:    structure; composi ...
• 和:    mix; blend
• 两:    two
• 种:    species
• 感光:    sensitization; pho ...
• 换:    exchange; barter; ...
• 能:    ability; capabilit ...
• 系统:    system