A4
n. A4型纸（规格为297×210毫米的纸）
🗣️ 情景例句
Sounds good to me.
我来。
I'm ill today.
今天我生病了。
The ground supported fewer plants, and the insects which lived on these plants died out.
地上长的植物少了，生活在这些植物上的昆虫就消亡了。