A3
n. A3号纸（尺寸为420×297mm的）
🗣️ 情景例句
He is a tremendous walker.
他很能走路。
What did the doctor say?
医生说了什么吗？
Insuring public or private property is a standard practice in most countries in the world.
承办公共财产或私人财产保险是世界上大部分国家的正常业务。