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
You really must have your wits about your when dealing with such people.
跟这类人打交道，你必须格外警觉。
A servant is known by his master's absence.
主人不在可以看出仆人的品行来。
Are you really going to retire, miss Marsh?
马什小姐，您真的准备退休吗？