The professor declaimed against the unfairness in the education system during the conference.

### 解释 declaimed 是动词 declaim 的过去式，declaim 由前缀 de-（表示"加强"）和词根 claim（声称、主张）组成，意思是"慷慨激昂地演说"或"强烈谴责"，通常带有公开演讲或正式抗议的意味。