ISBL信息系统基础语言isv.是（be的第三人称单数一般现在时）Is your tummy still sore?入侵部队; 侵略军Is it an optician's shop?[医] 退化性囊肿Is the station clock accurate火车站的表准吗?Is Mr Chan expecting you?渐开线样板Is the beauty a drunkard?渐开线齿轮Is that alright with you?体外治疗Is it true she's leaving?入侵部队ischemia-repcrfusion injury缺血再灌注损伤Ischemic mitral regurgitation缺血性二尖瓣反流Is the story interesting?倒位PCR