abbr. 概率分部函数（Probability Distribution Function）
🗣️ 情景例句
You really don't look your age.
你看起来比你的年龄要年轻。
By other's faults, wise men correct their own.
他山之石，可以攻玉。
As he hated army life, he decided to desert his regiment.
他讨厌军旅生活，决定逃离所在部队。