Qcs
abbr. 质量控制系统（Quality Control System）
🗣️ 情景例句
I certainly am. May I help you?
我是，我能帮您什么忙吗？
A stumble may prevent a fall.
小惩大诫。
would be like trying to meet a friend in London without a pre-arranged rendezvous and absurdly wandering the streets in the hope of a chance encounter.
就如同去伦敦见一位朋友，事先未约定地点，而荒唐地在街上游逛，以期待碰巧遇上一样。