abbr. 概率分部函数（Probability Distribution Function）
🗣️ 情景例句
I don't think I've had the pleasure.
我想我未曾有幸遇见过你。
Stop it.
停住，住手！
Lin Tao did quite well, but Bill did better than Lin Tao.
林涛跳得相当高，但是比尔比林涛跳得更高。