The primary reason for why experience and learning curve effects apply, of course, is the complex processes of learning involved.

为什么会产生经验曲线和学习曲线效应的首要原因是学习的复杂过程。

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The reasons for this prescription are actually a bit philosophical, but they come from experience in XML design, and observing the effects of both cases.

这样规定的原因实际上与观念无关，而是来自 XML 设计的实践和对两种方式的效果的观察。

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"We should know psychologically what the attraction of movies is, what the experience is like, and what the effects are," he said.

“我们要知道电影在心理上的吸引力何在，它如何影响心理，又会产生怎样的影响。”他说道。

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As co-chairs, we are personally committed to this work, having first-hand community and clinical experience in seeing and treating the devastating effects violence has on the lives of women and their families.

WHITEHOUSE: Progress to Date: President��s Working Group on the Intersection of HIV/AIDS, Violence against Women and Girls, and Gender-Related Health Disparities | The White House

Sharper graphics, vibrant animations and new widgets make HTC Sense look better than ever and, by continuing to focus on all of the aspects, both large and small, that make HTC Sense special, HTC introduces a more cinematic and immersive weather experience with stunning imagery and audible weather effects.

ENGADGET: HTC Sensation 4G official: 1.2GHz dual-core, qHD display, and Sense 3.0

They may also begin to need to do more and more of the activity over time to feel the effects, and experience physical and psychological withdrawal symptoms if they can't do it.

BBC: Why anything can be addictive