Ccsf
[医][=cerebrospinal fluid(drug)concentration]脑脊液（药物）浓度
🗣️ 情景例句
It's Richard's film!
Richard的底片找到了
I go out for lunch at about 12:30.
我在大约12:30去外面吃午餐。
Oh, hello, Jim. Glad to see you again. How are you?
啊，你好，吉姆。很高兴又见到你。你好吗？