Ccsf
[医][=cerebrospinal fluid(drug)concentration]脑脊液（药物）浓度
🗣️ 情景例句
Got to go and feed him.
我得走了， 该去喂他了。
How much do I owe you?
我欠你多少钱？
For them this is a major operation which involves considerable planning.
看戏在他们是件大事，需要精心计划。