the·o·rize /ˈθɪəraɪz， ˈθiːə-/ vi. | vt. ❶ vi. 1. 作理论上说明；(空)谈理论 It is a capital mistake to theorize before one has data. 还未掌握数据就空谈理论是个大错误。 2. 作理论推定(或推测) He did not know what had happened, so he could only theorize about it. 他并不知道所发生的事，所以就只能作理论上的推测。 ❷ vt. 使理论化；从理论上说明 About 100 years ago, two American researchers theorized that tooth decay was caused by a microbe. 约在100年前两位美国的研究工作者从理论上说明了龋齿是由一种微生物造成的。