Upf
abbr. unilateral pulmonary function 单侧肺功能; user port function 用户端口功能; universal picture format 通用图像格式; United Plastic Fabricating 塑料制品制作联盟
🗣️ 情景例句
Don't worry.
别担心。
When I had a rest, what were you doing?
当我休息时，你在做什么？
The contents were disappointing.
箱内东西令人失望。