Udf
abbr. 南非民主统一战线（United Democratic Front）；通用磁盘格式（Universal Disk Format）
🗣️ 情景例句
Then you have to fill out this form
然后你要填写这份表格，
We exchange products under almost all circumstances.
在各种情形下我们都可更换产品。
Shortly afterwards, four more policemen arrived and remonstrated with the workmen.
一会儿工夫，又来了4个警察，规劝工人离开。