On a cold day there can be quite a draught from the letterbox.

天冷的时候能明显感觉到从信箱那边吹来的过堂风。

柯林斯例句

Peep through the letterbox and see if anyone is at home.

透过信箱看家中是否有人.

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I personally saw him put the letter into the letterbox.

我亲眼看见他把信投送到信箱里.

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Putting pieces of folded brown paper in the letterbox for her.

还曾替她往信箱里放些折叠起来的棕色纸片.

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