helicobacter pylori antigen 基本例句 幽门螺杆菌 A hundred years ago, nearly everyone was infected with H. pylori.一百多年以前，几乎所有人都感染幽门螺杆菌。 The carcinogenetic and tumor-promoting effects of concentrated Helicobacter pylori culture supernatant in rats.幽门螺杆菌培养滤液诱癌和促癌作用的实验研究。