Mi5
abbr. 军情五处（Military Intelligence Security Service, 英国负责国内反间谍、反恐怖的情报部门）
📖 牛津释义
MI5
abbr
缩写 = (Brit) (former name for the) National Security Division of Military Intelligence （旧名）英国安全局（陆军情报局5处）.
🗣️ 情景例句
I've got it!
有啦！
Well, it depends.
这得视情况而定。
small at first, narrowly contained within its banks,
开始很小，被紧紧地夹在两岸中间，