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
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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
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a theory of education 教育理论
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[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
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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。
【数】 论,理论。
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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