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
All right. Is...is Susan coming?
好吧， Susan来吗？
Fishing is often frustrating.
钓鱼常常会遭到挫败。
Now, this is the chemistry lab. Have you been in this lab before?
好啦，这是化学实验室。你们以前到过这个实验室吗？