Invitational Education is a theory based on perceptual tradition, self concept theory and humanism.

邀请教育是一种基于知觉心理学、自我概念理论和人本主义教育观的教育理论。

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Meso analysis on disturbed state concept theory(DSC) based on hardening model was performed. The logical rationality of problem-solving steps of DSC was further proved.

对基于硬化模型建立的扰动状态理论（DSC）做出细观分析，进一步证明其解决问题的逻辑合理性。

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Concept, theory and characteristics of supercritical liquid, reaction kinetics and reaction selectivity under supercritical liquid.

介绍了超临界流体的概念、原理和特点，及在超临界下 反应动力学和 反应选择性。

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"When Darwin first proposed his theory in eighteen fifty-nine, he had no concept of a gene, no concept of a chromosome, no concept of mutation, and certainly no concept of things like DNA and RNA."

VOA: special.2009.12.01

Another important concept in probability theory that we will use a lot is expected value, the mean, or average-- those are all roughly interchangeable concepts.

概率论中另外一个常用的重要的概念是,期望值或者也叫均值,这两个概念可以互换

耶鲁公开课 - 金融市场课程节选

But, in terms of the basic theory, that's the core concept.

但在基本原理上来说,它是核心概念

耶鲁公开课 - 金融市场课程节选

"I think the concept and the theory of doing that kind of work is still a good one, " says Hess.

FORBES: As a businessman, he's been mixing with a sketchier crowd.

Alpha has always been a slippery concept: in theory there should not be much of it about and academics have struggled to find evidence that the industry consistently realises it for clients.

ECONOMIST: Hedge funds in trouble

In theory the UltraViolet concept has always been a solution to the problem for digital ownership of high value content however, when requiring so many different industries to support and agree on all aspects of the specifications of such a program, it can often feel like getting nations to agree on the Kyoto Protocol.

FORBES: UltraViolet: Boom Or Bust For Studios And Consumers?