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
Sure.
好的。
The more riches a fool hath,the greater fool he is.
愚人越富越蠢。
But neither psychiatric interviews nor objective tests were able to show any effects upon these American sailors.
但是，不管是进行精神病学的调查访问，还是进行客观的测试，都不能显示噪音对这些美国水兵有任何影响。