Ccsa
[计] 公用控制交换网
🗣️ 情景例句
Turn the key before you pump the pedal, or you'll flood the engine.
加水之前转动钥匙，要不发动机就给浇灭了。
A man is as old as he feels.
老不老，自己晓。
At the international level, sport is frankly mimic warfare.
在国际比赛中，体育简直是一场模拟战争。