The incidences of valve failure were 3.35%/patient-year for bovine valves, 1.52%/patient-year for porcine valves and 2.2%/patientyear for dura mater valves.是什么意思_The incidences of valve failure were 3.35%/patient-year for bovine valves, 1.52%/patient-year for porcine valves and 2.2%/patientyear for dura mater valves.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句