Umf
abbr. ultramicrofiche 超缩微平片，超缩微胶片
🗣️ 情景例句
This DJ is really good.
这个DJ真棒！
The mailbox is over there.
邮筒就在那儿。
He explained that his diet was so strict that he had to reward himself occasionally.
他解释说，他的饮食控制得太严格了，以致不得不偶尔奖赏自己一下。