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
That's a relief.
现在我放心了。
The end of next month looks like the most probable sales date.
下个月底好像是最佳的销售日。
He suggests you leave here at once.
他建议你立刻离开这儿。