Ccsf
[医][=cerebrospinal fluid(drug)concentration]脑脊液（药物）浓度
🗣️ 情景例句
So, how's work?
工作还顺利吗？
My brother and I used to go a lot of places together.
我的兄弟和我过去常一起去很多地方。
He noticed the remains of a snake which was wound round the electric wires of a 16,000-volt power line.
他发现了缠绕在16，000伏高压线上的一条死蛇。