基本解释视网膜后的同根派生 英汉例句However, the postretinal fibres and circumpharyngeal nerves of Ambrostoma quadriimpressum were highly developed. 马铃薯瓢虫和榆紫叶甲的冠极度退化,嗅叶相对不发达;postretinal fiber 视网膜后纤维