retrospective method造句

例句与造句

1. Methods 601 elderly p ati ents of internal medicine in our hospital were investigated with prospective and retrospective methods from january 1996 to december 1998
   方法对1996年1月1998年12月我院内科601例住院老年病人采取前瞻性与回顾性调查相结合的方法进行目标性监测。
2. It's difficult to find retrospective method in a sentence. 用retrospective method造句挺难的