theory
theory
(pl. -ies)
in theory
(pl. -ies)
- a supposition or a system of ideas intended to explain something, especially one based on general principles independent of the thing to be explained
学说；论说；论，说
Darwin's theory of evolution.
达尔文的进化论。
■a set of principles on which the practice of an activity is based
理论；学理，原理
a theory of education.
教育理论。
[mass noun]music theory.
音乐原理。
■an idea used to account for a situation or justify a course of action
意见，看法；推测
my theory would be that the place has been seriously mismanaged.
依我看这个地方的管理十分混乱。
■(Mathematics)a collection of propositions to illustrate the principles of a subject
(数)论，理论
in theory
- used in describing what is supposed to happen or be possible, usually with the implication that it does not in fact happen
理论上（应该）；照道理
in theory, things can only get better; in practice, they may well become a lot worse.
理论上情况只会变好，实际上却很可能变得更糟。
- late 16th cent. (denoting a mental scheme of something to be done): via late Latin from Greek theōria 'contemplation, speculation', from theōros 'spectator'
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- emaciate vt.使消瘦，使衰弱
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- emaciation n.消瘦，憔悴，衰弱
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- emanant n.放射式 adj.发散的，发射的
- emanate vi.发出，散发,放射,起源
- emanation n.发射,散发,发射物,（由衰变产生的）射气
- emanative adj.流出的，发散的，发射性的
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