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Numerous studies have now found that when classroom material is made harder to absorb, pupils retain more of it over the long term, and understand it on a deeper level.

如今有大量研究发现，当课堂材料变得更加难以消化时，长期来看学生们会记住更多的材料，对其理解也更加深入。

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Maintaining relationships over the long term takes effort.

长期维持关系需要努力。

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Over the long term, secondhand smoke also raises the risk of disease in nonsmokers.

VOA: special.2009.01.07

In this case, to optimize for the best of the whole community and the whole user base and over the long term and that's important too, your long over short term.

在这个前提下,去寻求整个社会,以及所有用户的长远利益的最大化,这十分重要，我们寻求长期利益，而非眼前利益。

斯坦福公开课 - 扎克伯格谈Facebook创业过程课程节选

"Developing countries have said that without real movement on those resources over the long term, there wont be a deal in fact,".

VOA: standard.2009.12.11

But over the long term, an all-of-the-above energy strategy means we have to do more.

WHITEHOUSE: Weekly Address: An All-Of-The-Above Approach to American Energy | The White House

Over the long term, we want to make sure services work seamlessly across any screen.

FORBES: Google: Global Ad Demand Still 'A Mixed Bag'

There would be few photo opportunities, but real and inexpensive success over the long term.

FORBES: Why "Green Jobs" Don't Belong in Obama's Jobs Program