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。

youdao

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》

youdao

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