ISNT原位切口移位法
isv.是(be的第三人称单数一般现在时)
Ischemia precondition缺血预处理
Is your ear ring?
is there any room for还有什么 ... 吗
Is it fine today?
Is my bill ready?
Is my packing OK?
Is John Smith in?
Is generous to people为人四海
Is this your key?
Is it your dress?