Chss
abbr. Cooperative Health Statistics System 合作衛生統計體系
??? 情景例句
I'm sorry, I really don't know.
對不起，我真的不知道。
Contact me by telephone.
電話跟我聯絡。
Once the existence of this wave-length had been discovered,
一旦這種波長的實際存在被發現，