PYF酵母提前絮凝Pn.字母PPyranose oxidase吡喃糖氧化酶Pyxidea mouhotiin.银缘摄龟p-Phenvlphenol对苯基苯酚P-is no sin.[谚]贫非罪。pyruvic aldehyde丙酮醛P.E. ability体育能力Pyrularia edulisn.檀梨Pythium diclinumn.异丝腐霉P.A.Y.E.abbr.=pay as you earn 按收入来源查征苛税方式pyrrole molecule吡咯分子

1. 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。
2. Gastritis is often accompanied by infection with Helicobacter pylori.
   胃炎常伴有幽门螺旋杆菌的感染。