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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On a deeper level, rhetoric also involves cultural specifics.

更为深层的原因，修辞还涉及到文化这一层面。

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Y - Youth - using social networking allows you to connect on a deeper level with young people.

Y - Youth(年轻人)使用社交网络能让你与年轻人产生更深入的联系。

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But on a deeper level, this highly regarded denominational leader seems to embody the post-denominational future of Judaism.

ECONOMIST: It��s less obvious than you might think

With direct marketing, you're trying to engage the customer on a deeper level than simply their pocket book at the grocery store.

BBC: The Halloween maize maze

"It works as a way to reach my fitness goals, but it also is helping me on a deeper level, " she said.

CNN: Want to get fit? Pull out your phone