及物动词
1. The historical background to the play has been very carefully researched. 这部剧本的历史背景已有人作过仔细的研究。
不及物动词
1.
1. He is researching into the causes of cancer. 他正在研究癌症的起因。
名词
1. research的近义词
1. She's doing cancer research. 她在从事癌症研究。