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
Somebody else'll buy it by then.
别人也许买走了。
Patience, time, and money overcome everything.
耐心，时间和金钱可以征服一切。
I heard some one laughing.
我听见有人在笑。