Talk to anyone in the drug industry , and you'll soon discover that the science of genetics isthe biggest thing to hit drug research since penicillin was discovered.

　　译文：

　　只要你和制药业的任何人进行交谈，就会很快发现自从青霉素出现以来，遗传学对制药研究的影响是最大的。

　　点睛：

　　句首的Talk to...industry为祈使句，相当于一个条件句，逗号之后的分句通常用将来时。that引导的是discover的宾语从句，其中还包含since引导的时间状语从句。动词不定式to hit drug research作thebiggest thing的后置定语。