But milk is a fluid. Don't you think I'm supposed to drink a lot of fluids when I have a cold?

但是牛奶是一种流质，你不认为我感冒时应该多喝一些流质吗？

youdao

You can use PCR for fingerprinting as well, for looking in some unknown fluid for example, is a gene that I'm interested in there?

也可以用PCR做生物指纹鉴定,比如在一个未知溶液样本中,里面是不是有我感兴趣的那段基因呢

耶鲁公开课 - 生物医学工程探索课程节选