C2 based on what is experienced or seen rather than on theory以经验(或实验)为依据的;经验主义的;来自经验(或观察)的
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。