Chapter one describes the summary of background and purpose of the research.

第一章综述本文的研究背景和意义。

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In the preface, the background and purpose and how to deal with the problem are introduced.

前言部分，介绍了研究背景、研究目的与研究方法。

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Background and Purpose: the group therapy plays an important role for psychiatric patient in an acute ward.

背景和目的：团体治疗在精神科病房对病患治疗扮演著重要的角色。

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We must remember that the same thing that defined our strength on that day should define our strength in response -- a nation that unites people from every faith, culture and background in a common purpose.

CNN: Don't scapegoat a faith for bombings

And the strongest democracies flourish from frequent and lively debate, but they endure when people of every background and belief find a way to set aside smaller differences in service of a greater purpose.

WHITEHOUSE: Presidential Press Conference

As background, the EFSF is the special purpose vehicle which is to buy the bonds of Italy, Greece and other countries so that yields do not soar and thus default can be avoided.

FORBES: Eurozone Crisis: EFSF Buys its Own Bonds