letterbox

名词邮筒，邮政信箱

1. 信箱：在使用传统投影机播放2.35:1超宽电影时,如果以信箱(Letterbox)方式播放,虽然电影的全部原始画面都被保留了,但屏幕上下的未使用部分则会出现黑条,而这种现象是绝大部份人无法接受的.

2. 邮筒：mileage 里程 | letterbox 邮筒 | first-aid kit 急救箱

3. 信报箱：相框photoframe | 信报箱letterbox | 修改胶带correctiontap

4. 供料机通道口：letterarticulation 字母清晰度 | letterbox 供料机通道口 | lettercase 字母盘

1. （门上的）信件投递孔；（建筑物入口处的）信箱
    A letterbox is a rectangular hole in a door or a small box at the entrance to a building into which letters and small parcels are delivered.

2. （电视或计算机显示）信箱格式的，上下黑边的，宽屏的
    If something is displayed on a television or computer screen in letterbox format, it is displayed across the middle of the screen with dark bands at the top and bottom of the screen.

1. Goater was scratched by Lana's claws when he put his hand through a letterbox about 6 inches off the ground.

2. They pushed a noise abatement notice through the letterbox, after which the music stopped.