[C]门,栅栏门a movable frame, often with bars across it, which closes an opening in a fences, wall, etc., and provides a way of entering or leaving a usually outdoor place
[C]登机口an entrance or way out, especially in an airport
[C]入场费,门票收入; 观众人数the money paid by these people; the number of people who go in to see a sports even, especially a football match