Udc
abbr. 国际十进位分类（universal decimal classification）
🗣️ 情景例句
Can't you figure it out?
找不到答案吗？
A fool always comes short of his reckoning.
愚人常缺算计。
I assure you that you will feel no pain at all.
我保证你根本不会觉得疼的。