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
but our schedules won't allow it.
但我们的工作时间表不允许这样。
Do you have any friends?
你有朋友吗？
The question became one of whether Man could control the disease he had invented.
现在的问题是，人类能否控制住这种人为的疾病。