Udc
abbr. 国际十进位分类（universal decimal classification）
🗣️ 情景例句
Come and sit down for a minute, Michelle.
过来坐一会儿， Michelle。
I don't have the nerve to do it.
我没勇气去做。
My name is Wu Jun. This is our first lesson, so I don't know all your names.
我叫吴军。这是我们第一次上课，所以我认不全你们的名字。