community trail），又称预防试验（preventive trial）或 干预试验 （ intervention trial ）：以社区人群为研究对象，对预防药物或措施的效果进行检验和评价；或在疾病尚未发生之前对...
双语例句
1
A randomized controlled trial of preventive antibiotics used for esophageal operations.
食管手术预防性抗生素使用的随机对照研究。
2
The researchers note that because this trial used purified EPA instead of the fish oil used in previous studies, the preventive effects on stroke can be attributed to EPA.