letter-box

基本解释

Yesterday she found this leaflet in her letter-box.
昨天她在信箱里发现了一张宣传单。
The newspapers were so tightly jammed in the letter-box that I could hardly get them out.
信箱里的报纸塞得太紧了，我几乎没法把它们拿出来。
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There are two collections a day from this letter-box, ie The postman empties it twice a day.
这个信筒每天收信两次（邮递员每天取走两次）。

The other thing I noticed, only after I had read the letter through, was the absence of a post-office box address.
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A letterbox is a rectangular hole in a door or a small box at the entrance to a building into which letters and small packages are delivered.
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.