portaln.入口；大门；门静脉；[计]门户adj.门静脉的；肝门的portal gantry起重机门架portal lobule门管小叶,门小叶portal frames门式刚架portal atresia门静脉闭锁portal chamber峒门室Portala Palace布达拉宫portal of exit病菌出口portal service门户portal section洞口段portal website门户网站