A4
n. A4型纸（规格为297×210毫米的纸）
🗣️ 情景例句
Well, have a nice trip and best wishes to your wife.
祝你一路顺风，并替我向你太太问好。
Birds of a feather flock together.
物以类聚，人以群分。
But as they soon discovered, disguises can sometimes be too perfect.
但他们很快就发觉，化装的效果有时过分完美了。