Ccsa
[计] 公用控制交换网
🗣️ 情景例句
Some people seem too think its for practicing grammar rules and learning lists of words.
一些人认为它是用来操练语法规则和学习一大堆单词。
Would you meet me 3:30?
你能在三点版和我见面吗？
A wet road is usually slippery.
潮湿的路往往是滑的。