可数名词：
1. 门，门户
2. 途径（这里指的是BBS站的扩充功能或扩充程序, 如较常见的有DOORWAY等程序.）
the entrance (the space in a wall) through which you enter or leave a room or building; the space that a door can close
a swinging or sliding barrier that will close the entrance to a room or building or vehicle
a room that is entered via a door
a structure where people live or work (usually ordered along a street or road)
anything providing a means of access (or escape)
at the door prep.临近
be on the door 守门, 门口值勤
door to door service 门到门服务，门对门运输
door to door transport 门到门运输
from door to door adv.挨家挨户地
door to door car 送货用汽车
door to door transportation 门对门运输
door to door service 【经】 送货上门服务
door to door risk 【经】 库房至库房风险(条款)
from door to door selling 【经】 按户上门推销, 挨家挨户上门推销
door n.[C]1. 门，门户2. 途径（这里指的是BBS站的扩充功能或扩充程序, 如较常见的有DOORWAY等程序.）
door to door a. 挨户访问的,按户送达的ad. 挨户访问地,按户送达地
door keeper n. 看门人
side door n. 1.边门，侧门 2.“后门儿”，间接的途径
revolving door a.
1.不停旋转的;一直重复的;出入频繁的;来来回回兜圈子的
2.快似旋转门的The movie actress had six revolving-door husbands
next door adj. 隔壁的
out of door a. 室外的,露天的
door frame n. 门框
door bell n.门铃
barn door 谷仓大门
