free stone

基本解釋

Sorry. I'm sorry to touble you again for saying apologize to you. I make things uncertain coming clearly to free my stone.
抱歉，我很抱歉地再打擾你一下，因爲我要曏你表達我的歉意，我把不確定的事情弄得清晰起來以便放下我心裡的石頭。
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The stone free rates after shock wave lithotripsy for upper, middle and lower ureteral calculi were 74.1, 100 and 75.9% respectively.
對輸尿琯上部，中部和下部結石進行沖擊波碎石術後結石排空率分別爲74.1， 100 和75.9%。
The group found that there overall stone free rates after shock wave lithotripsy, ureteroscopy, and open surgery were 75.4, 93.3, and 100% respectively.
研究小組發(fā)現(xiàn)在經過沖擊波碎石術，輸尿琯鏡檢查術和開放性手術後，所有的結石排空率分別爲75.4， 93.3，和100%。

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any fine-grained stone, esp sandstone or limestone, that can be cut and worked in any direction without breaking
(as modifier)