Umf
abbr. ultramicrofiche 超缩微平片，超缩微胶片
🗣️ 情景例句
I had a million things to do today.
我今天有成千上万的事要做。
So he keeps on studying after his English classes in order to prepare for life in America.
所以他在英语课下课后还继续学习，为以后在美国生活做准备。
Bottoms up!
干杯（见底）！