Ccsa
[计] 公用控制交换网
🗣️ 情景例句
When my girlfriend rings me out of the blue, I'm in a good mood for the rest of the day.
我突然接到女朋友的电话，接下来的一整天我的心情都很好。
Are you in touch with him now?
你现在和他有联系吗？
We can have our coffee there.
我们可以在那里喝咖啡。