Ccsf
[医][=cerebrospinal fluid(drug)concentration]脑脊液（药物）浓度
🗣️ 情景例句
Aren't you a little scared?
难道你不会感到有点紧张吗？
Should I take the bus?
要乘公共汽车吗？
How interesting! said Ann. It makes me feel thirsty!
“真有趣！”安说，“都让我觉得口渴了！”