Ccsf
[医][=cerebrospinal fluid(drug)concentration]脑脊液（药物）浓度
🗣️ 情景例句
I told you you'd like it. I've been doing this for years.
我告诉过你你会喜欢的。我多年来一直从事这项活动。
Thrift is good revenue.
节约是个好收入。
While she always criticized the fickleness of human nature, she carried on an unrelenting search for the ideal servant to the end of her days,
她一方面总是批评人的本性朝三暮四，另一方面她又持之以恒地寻找一个理想的佣人。