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
and from the University of Michigan in 1956.
一九五六年从Michigan大学毕业。
This is a revolutionary new product.
这是一种革命性的新产品。
Yes. I wrote it down on a piece of paper. Here it is!
是的。我写在一张纸上了。在这儿！