Posterior segment changes include ascular engorgement or central retinal ein occlusion, which eentually leads to permanent loss of isual acuity.是什么意思_Posterior segment changes include ascular engorgement or central retinal ein occlusion, which eentually leads to permanent loss of isual acuity.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句