A4
n. A4型纸（规格为297×210毫米的纸）
🗣️ 情景例句
They come back here for lunch,
他们回到这儿来吃午餐，
It has been a long time since last came here.
自从我上次来这里已经有很长时间了。
'If the money was not paid promptly,
如果交款不及时，