n. someone who theorizes (especially in science or art)
n. 理论家, 理论工作者
1. The scientist is a well-known theorist in the field of psychology.
这位科学家是心理学领域著名的理论家。
2. Many theorists believe that climate change is a serious issue we must address.
许多理论家认为气候变化是我们必须解决的严重问题。
3. The theorist presented a new idea about the nature of time.
这位理论家提出了关于时间本质的新观点。