例句與造句

1. Our finging s indicated that the laser operation is effective one , but most unsucce ssful results were caused by residual valve in the urethral
   結(jié)果表明，此種激光治療后尿道狹窄成功率高，但尿道內(nèi)殘余瓣膜是手術(shù)失敗的主要原因。
2. It's difficult to find residual valve in a sentence. 用residual valve造句挺難的