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
Shells she sells on the seashore are seashells I am sure.
我敢肯定她在海边卖的贝壳是海贝。
Each single crate is heavily padded and packed with 4 carboys.
每只木条箱内装4只大瓶子将空余处填满。
What I want to do is different from those of others.
我想做的与别人不同。