theory
/ˈθɪ.ɹi/ 名词 B1中文： 理论、学说、定理
- A description of an event or system that is considered to be accurate.
- A coherent statement or set of ideas that explains observed facts or phenomena and correctly predicts new facts or phenomena not previously observed, or which sets out the laws and principles of something known or observed; a hypothesis confirmed by observation, experiment etc.
- The underlying principles or methods of a given technical skill, art etc., as opposed to its practice.
- A field of study attempting to exhaustively describe a particular class of constructs. · Knot theory classifies the mappings of a circle into 3-space.
- A set of axioms together with all statements derivable from them; or, a set of statements which are deductively closed. Equivalently, a formal language plus a set of axioms (from which can then be derived theorems). The statements may be required to all be bound (i.e., to have no free variables). · A theory is consistent if it has a model.
- The standardization and study of fixed sequences of moves, especially in the opening phase of a game. · Near-synonym: joseki
- A hypothesis or conjecture.
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“Have you formed a theory about how that bell rang?”
Presuming that your theory is correct, if he can lay his hands upon the man who threatened you last night he will have gone a long way towards finding who took the naval treaty.
Indeed, his mood was infectious, for I lay tossing half the night myself, brooding over this strange problem, and inventing a hundred theories, each of which was more impossible than the last.
All day I turned these facts over in my mind, endeavouring to hit upon some theory which could reconcile them all, and to find that line of least resistance which my poor friend had declared to be the starting-point of every investigation.
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