Objective: to explore the relationship body mass index (BMI) during pregnancy and headpresentation dystocia.
目的：探讨孕期体重指数(BMI)与头位难产的关系。
2
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。
3
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.