The flow needs to be stagnated for drilling mud to kill a well and you would ideally require undamaged wellbore casing.
流需要钻井泥浆杀了停滞和理想情况下，你会需要完好的井筒套管。
Two months after the surgery, an echocardiogram showed that the regenerated hearts were functioning as well as the undamaged ones.
术后两个月，超声心动图显示再生的心脏在功能上与未受损的心脏势均力敌、难分伯仲。
Two months after the surgery, an echocardiogram showed that the regenerated hearts were functioning as well as the undamaged ones.
术后两个月，超声心动图显示再生的心脏在功能上与未受损的心脏势均力敌、难分伯仲。
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