0 a formal statement of the rules on which a subject of study is based or of ideas that are suggested to explain a fact or event or, more generally, an opinion or explanation -- 理论；学说；意见
It was Ptolemy who propounded the theory that the earth was at the centre of the universe.
This new evidence lends support to the theory that she was murdered.
This research seems to give some validity to the theory that the drug might cause cancer.
In Jungian theory, there are certain archetypes of human personality.
Does the autistic child have a "theory of mind"?
It is theory tested by many individual research findings that permits the generation of predictions about program outcomes under different conditions.
In theory, village development plans flow up through district and regional development committees to the central government.
