random trial

• 随机试验

random trial的用法和样例：

例句

1. This is the first randomized trial to compare these two approaches in patients with obscure gastrointestinal bleeding.
   这个是在不明原因的胃肠道出血的患者上的第一次随机试验来比较两者方法。
2. The prevention of hip displacement has not been studied in a randomized trial as far as we know.
   据我们所知，到目前为止还没有一个随机试验用来研究预防髋关节脱位。