Ccsf
[医][=cerebrospinal fluid(drug)concentration]脑脊液（药物）浓度
🗣️ 情景例句
There's a possibility that he'll get promoted.
她大概会获得提拔。
How much do I owe you?
我欠你多少钱？
Last year a journalist had been instructed by a well-known magazine to write an article on the president's palace in a new African republic.
去年，一位记者受一家有名的杂志的委托写一篇关于非洲某个新成立共和国总统府的文章。