abbr. 概率分部函数（Probability Distribution Function）
🗣️ 情景例句
A lot of people would like my help.
许多人要我帮助。
They don't know when the wedding will be.
他们不知道婚礼将是什么时候。
I'm glad our negotiation has come to a successful conclusion.
我很高兴这次洽谈圆满成功。