free from contamination caused by harmful bacteria, viruses, or other micro-organisms 无菌无毒的,防感染的 ■(of surgical practice) aiming at the complete exclusion of harmful micro-organisms (外科手术)完全无菌的 ■(of a wound, instrument, or dressing) surgically sterile or sterilized (伤口,手术器具,包扎)严密消毒的