More than half of children who use electronic media before bedtime may have mood or learning problems during the day, a preliminary study of 40 young people suggests.

一项对40名孩子的初步研究表明，睡前使用电子媒体的孩子大约会有一半人在第二天出现情绪或学习上的问题。

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The good cholesterol HDL, which reduces the risks of heart disease, can be dramatically boosted by an experimental drug that also lowers bad cholesterol, according to a preliminary study.

初步研究表明：一种实验药物可显著升高，对人体有益胆固醇HDL含量，HDL可降低罹患心脏病的危险性；该药还可降低有害胆固醇的含量。

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The paper also makes a preliminary study of the plant's biological and ecological features and thus paves the way for protection and utilization of this rare and near-extinctive plant.

同时对龙棕的生物学特性及生态学习性进行了初步研究，为保护和开发利用这一珍稀濒危植物资源提供科学依据。

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But again, pretty preliminary and not a complete study.

当然,只是初步结果,还没全部完成

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

In a follow-up to a preliminary study published four years ago, he looked at ocean-temperature surveys made over the past 65 years.

ECONOMIST: More evidence that global warming is man-made

Bander acknowledged that the gadget project was a preliminary study.

FORBES: Eye-Tracking Study Finds iPhone, iPad Draw More Attention Than Android Devices

In a preliminary study, Dr McNamara discovered that those with Parkinson's had lower levels of religiosity than healthy individuals, and that the difference seemed to correlate with the disease's severity.

ECONOMIST: The science of religion