Conclusion: The main causes of the failure of URSL for ureteral calculi are stone migrations, tortuous or narrow ureters, unclear operation area and ureteral perforation.是什么意思_Conclusion: The main causes of the failure of URSL for ureteral calculi are stone migrations, tortuous or narrow ureters, unclear operation area and ureteral perforation.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句