empirical
adjective uk/ɪmˈpɪr.ɪ.kəl/ us/emˈpɪr.ɪ.kəl/
C2 以经验（或实验）为依据的；经验主义的；来自经验（或观察）的
based on what is experienced or seen rather than on theory
This theory needs to be backed up with solid empirical data/evidence. 这个理论需要翔实的实验数据／实践经验来支持。
Empirical studies show that some forms of alternative medicine are extremely effective. 临床研究表明某些替代疗法极其有效。