theory可数吗

　　The theory has been superseded by more recent research.

　　这一理论已为新近的'研究所取代。

　　I have this theory that most people prefer being at work to being at home.

　　依我看，多数人喜欢工作而不愿待在家里。

　　The comparison shows considerable disagreement between theory and practice.

　　这一对比表明理论和实践之间有相当大的出入。

　　I accept his theories, but not without certain qualifications.

　　我接受他的理论，但并非毫无保留。

　　And that's where the theory falls down.

　　这就是该理论的不足之处。