Ccsso
abbr. common channel signaling switching office 共路信令交换局; Council of Chief State School Officers 重点州学校管理者委员会
🗣️ 情景例句
I'd like your help.
我要请你帮忙。
Where are you from?
你来自哪儿？
He called out to the children and threw the ball back to the bank.
他大声叫着那些孩子，把球扔回到岸上。