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
What works?
什么有效！
Please stop by (drop in) sometime.
请于近日过来坐坐。
Joe Sanders has the most beautiful garden in our town.
乔。桑德斯拥有我们镇上最漂亮的花园。