A3
n. A3号纸（尺寸为420×297mm的）
🗣️ 情景例句
Mary, this is Stone's brother Jim.
玛丽，这是世通的兄弟吉姆。
Quick feet and busy hands fill the mouth.
手勤脚快，嘴里吃饱。
Oxygen is widely used in ship repairs for cutting and joining metal plates or pipes.
在船舶修理过程中，常常使用氧气切割和焊接金属板或金属管。