First, he exposed embryos created in Petri dishes to a common AIDS drug called nevirapine, which works by gumming the enzyme up.

• 在第一种方法中，他将一款治疗艾滋病的普通药物奈伟拉平放入在无菌培养皿培育的胚胎中，将这种酶吞噬掉。