Ccsa
[计] 公用控制交换网
🗣️ 情景例句
Can you have lunch with us later?
你能与我们一起共进午餐吗？
A spot is most seen on the finest cloth.
最清洁的布上，污点特别显眼。
You will find that people will help you if you are ready to help them.
你会发现，如果你乐于帮助别人，别人也会帮助你。