ISWAn.国际固体废物和公共清洁协会
isv.是(be的第三人称单数一般现在时)
Is this your book?这是你的书吗?
Is this your desk?
Is it my turn now?
Is this cup yours?
Is Mr.Lee there?
Is he a tough guy?
Is the gun loaded?
Ischemia heart disease缺血性心脏病
Is this your room?
ischiofemoral ligament坐股韧带