A4
n. A4型纸（规格为297×210毫米的纸）
🗣️ 情景例句
I might as well take it along.
我还是一道带着。
Sure thing, boss. All in a day's work.
当然，头，这是家常便饭。
I'll call a taxi in case of need.
如果需要的话，我会叫出租车的。