nebulan.[天]星云;[医]角膜云翳
Nebula Removing Powder拨云散
nebula covering the pupil膜入水轮
nebula covering the cornea玉翳浮满, 玉翳遮晴, 玉翳浮晴
nebulae mentholi compositae复方薄荷喷雾剂
nebula-eliminating exercise明目法
"the nebular hypothesis of the origin of the solar system"