Dxf
abbr. diagram interchange file 图形交换文件; digital exchange format 数字交换格式
🗣️ 情景例句
Never know what?
说不定什么？
You are welcome.
不客气。
The workmen struggled fiercely and one of them lost his temper.
两个工人奋力抗争，其中一个发了火，