Ccsf
[医][=cerebrospinal fluid(drug)concentration]脑脊液（药物）浓度
🗣️ 情景例句
I sure do.
我当然记得。
He that once deceives is ever suspected.
骗人一次，受疑一世。
We're going to meet here, outside the school gate, at two o'clock.
我们打算两点钟在校门外见面。