常見例句prerectal pouch 直腸前陷凹prerectal ridge 直腸前脊lithotomy prerectal [醫(yī)] 直腸前切石術(shù), 正中切石術(shù)prerectal lithotomy 直腸前切石術(shù), 正中切石術(shù) 返回 prerectal