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
What are your hobbies?
你有那些爱好？
You forgot to fasten the collar buttons.
你忘了系鞋带。
Nobody! She taught herself.
没有人（教）！她是自学的。