The theory has been superseded by more recent research.
這一理論已為新近的研究所取代。
I have this theory that most people prefer being at work to being at home.
依我看，多數人喜歡工作而不愿待在家里。
The comparison shows considerable disagreement between theory and practice.
這一對比表明理論和實踐之間有相當大的出入。
I accept his theories, but not without certain qualifications.
我接受他的理論，但并非毫無保留。
And that's where the theory falls down.
這就是該理論的不足之處。