Acda
abbr. 军备监督和裁军署（Arms Control and Disarmament Agency）
🗣️ 情景例句
It's about my grandfather.
是关于我爷爷。
Don't be offended by his haste, he is a very busy man.
别为他的轻率介意，他是个大忙人。
Why not?
为什么？