Objective: to explore the relationship body mass index (BMI) during pregnancy and head presentation dystocia.

目的：探讨孕期体重指数(BMI)与头位难产的关系。

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In a perfect world, we would hope that every article, paper, Redbook, slide presentation, and system design would address these important issues head on.

在完美的世界中，我们希望每篇文章、论文、红皮书、幻灯片和系统设计都率先解决这些重要问题。

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But before the presentation, as required by law, Yahoo's head of investor relations read the list of risk factors — things that could go wrong for shareholders and depress the stock even further.

在报告公布之前，雅虎的投资者关系主管按规定列举了一系列进一步降低股价的风险因素。

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So during the presentation, the head of the company decided to start yelling at him.

FORBES: Kindness At The Office

Bill Squadron, Head of Bloomberg Sports, began the presentation by providing a brief overview of both products before introducing pitching guru Rick Peterson.

FORBES: Fond Reflections On The Winter Meetings

In June 2010, DECC's then head of science Dr Nafees Meah gave an internal presentation to colleagues about communicating climate science.

BBC: When the word 'saintly' can be made a state secret