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
OK, here are the walnuts.
嗯， 核桃在这 。
What is the total circulation of this publication.
这家刊物总发行量多少？
Look! What does that boat look like?
瞧！那艘船看起来像什么呀？