A3
n. A3号纸（尺寸为420×297mm的）
🗣️ 情景例句
How soon will my mail be received by the other end?
我的信件多快能被对方收到？
Slowly, mountains are worn away by the wind.
山体逐渐被风化了。
His bike hit the bag of rice and he fell off.
他的车撞到大米上，他摔了下来。