Pmf
abbr. probable maximum flood(ing) 可能最大血崩，可能性最大洪水
🗣️ 情景例句
Your brother left his bag of film on the ferryboat.
你哥哥将他的旅行袋遗放在渡船上了。
First think, and then speak.
先想后说。
Yes. It sounded like a train that was going under my house.
是的。这响声听起来像是一列火车在从我的房子下面驶过。