And the reality is that antibiotics have been responsible for saving millions of lives since penicillin, one of the earliest antibiotics, was first used on a clinical basis 70 years ago.
出自-2017年6月听力原文
柯林斯高阶英汉双解学习词典释义
N-UNCOUNT
青霉素;盘尼西林
Penicillin is a drug that kills bacteria and is used to treat infections.