Ccsf
[医][=cerebrospinal fluid(drug)concentration]脑脊液（药物）浓度
🗣️ 情景例句
but I knew engineering was not for me.
但我知道工程对我不合适。
Love and business teach eloquence.
爱情和买卖可以培养口才。
Nice to meet you.
很高兴见到你。