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
Good.
好极了。
I will if I can.
如果我能，我愿意的。
He was astonished at what he found.
看到的情景使吃惊，