11.Annular thickening Rings of thickening laid down on the inner wall of protoxylem vessels and tracheids.环状加厚:原生木质部导管和管胞的内层环状??厚。 12.angioreticuloma of cerebellum小脑血管网状内皮瘤 13.a complicated vascular meshwork复杂的脉管网状组织 14.Defines the current state of the Ring ...