例句與造句

1. Conclusion ultrasonic approach is the first choice for diagnosis low segment ureteral polyp , and it is more valuable in patients complicated with x - ray negative stone , difficult for retrograde urethrography and allergy to iodine
   結(jié)論超聲是輸尿管下段息肉的首選篩查方法，對(duì)合并陰性結(jié)石、逆行造影困難、碘過敏者更具有價(jià)值。
2. It's difficult to find retrograde urethrography in a sentence. 用retrograde urethrography造句挺難的