The preface part mainly explains the possibility and necessity that the problem studies, the study range of the article and the studying situation in current academic circles.

前言部分主要说明本课题研究的可能性和必要性，本文研究的范围以及当前学术界对该课题研究的现状。

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Recent studies suggest that as many as 5 in 1,000 new mothers are likely to have this problem.

最近的研究表明，1000个新妈妈中有多达5个可能有这个问题。

《柯林斯英汉双解大词典》

However, several studies have shown a serious problem: today's teenagers lack media literacy.

然而，一些研究显示了一个严重的问题：现在的青少年缺乏媒体素养。

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Studies support the theory that there are several causes, instead of a single environmental cause or genetic problem.

VOA: special.2009.01.06

But there's a big confound, there's a big problem in studies of those kind of relationships.

但是有一个让人混淆的问题,存在于这种关系的研究中。

耶鲁公开课 - 心理学导论课程节选

The subjects of the study were asked to solve a particular problem-solving task previously used in other psychology studies researching problem solving.

FORBES: Need to Solve a Problem Quickly? Laugh!

There's only one problem: Cancer studies are not what others heard Merck promise at its meeting with the financial community in 2001.

FORBES: The Vioxx Safety Study Merck Didn't Do

The problem is that many studies in this field are small and have many limitations.

FORBES: Why Remote Patient Monitoring Is Overhyped