Pecm
abbr. passive electronic countermeasures 被动电子对抗，无源[消极]电子干扰; Preliminary Engineering Change Memorandum 初步工程更改备忘录（美国空军）; processing element control memory 处理单元控制存储器
🗣️ 情景例句
I'd like to talk to you about something.
我想跟你谈一件事。
The restaurant doesn't open until seven forty-five.
饭馆要到七点四十五分才开门。
We'll stay here with you until help comes.
在有人来救援前，我们要留在这儿。