Umf
abbr. ultramicrofiche 超缩微平片，超缩微胶片
🗣️ 情景例句
My brother Robbie ...
我弟弟Robbie……
Nothing is so certain as the unexpected.
天有不测风云，人有旦夕祸福。
Would it be too much to ask you to respond to my question by tomorrow?
可以请你在明天以前回复吗？