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
The scheme is well worth a try.
这个计划倒值得一试。
He likes playing the piano.
他喜欢弹钢琴。
7 p.m. Will you be free then?
晚上7点。那时你有空吗？