This tutorial demonstrates how easy it is to replace one with the other in the sample Phonebook application.

本教程演示了在样例电话本应用程序中用其中一项技术替代另一项技术有多么简单。

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We hope it would be effective and at the same time it demonstrates that we don’t single out one particular herb or emphasize the importance of one particular policy.

我们希望这个综合治疗是有效果的，同时也反映了我们不单独强调某一味药特别有效或者单独就能起到足够作用的看法。

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"One result of this research is that it demonstrates how modern technologies could change and drastically improve product safety," Slezak said.

“此项研究的一个结果是，它向我们展示了现代科技可以极大地提高产品安全性，”Slezak说。

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He demonstrates it on one of his patients, Stefan Osafo.

BBC: How the hand-held ultrasound scanner works

It is one of the items that demonstrates the seriousness with which he approaches this challenge, the seriousness with which he believes -- the seriousness with which he approaches the necessity of bipartisan cooperation and his willingness to make tough choices in an effort to find common ground.

WHITEHOUSE: Press Briefing

The comparative is useful in that it demonstrates why it is important to not have a one-size-fits-all approach, because the situations can be different even though the broader unrest in the region obviously is similar or reflects an overall trend in the region.

WHITEHOUSE: Press Briefing