由于中风的严重程度是关系到恢复的重要因素，所有的病人在参与这次研究之前都会进行脑部扫描，以确定脑部损伤程度。

Because the severity of stroke is an important factor in recovery, all patients will undergo brain scans prior to taking part in the study to determine the degree of damage to the brain.

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人在这个转变过程中是一个关键因素；相关的成功因素包括。

People are a key factor in this transition; related success factors include.

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我们每个人对这些不确定性的感觉也有差异，不仅仅是不同的人有不同的答案，即便同一人在面对一系列不确定因素时，也会有不同的反应。

Each of us feels differently about these uncertainties, so not only are the answers different for different people, but also different for the same person confronting a range of uncertainties.

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Wouldn't natural selection favor the people who take introductory psychology, come to my Valentine's Day lecture, listen carefully to the big three and the more interesting four, ? and then go out there and put them into practice?

自然选择会不会青睐,那些学习心理学导论，在情人节来听我讲座，专心致志听我讲影响吸引力的三大因素,和四个有趣因素，然后在生活中应用这些知识的人？

耶鲁公开课 - 心理学导论课程节选

Serfs who are compelled to work the land, or in some places even slaves, well, they have no incentive, put aside the question even of capacity, to invest capital for the purpose of improving the size and quality of the their crops, their trees, their vines.

那些被强迫耕种土地的农奴,或者是那些在其他地方直接成为奴隶的人,刨除能动性因素,农场主们,没有任何理由投资钱财,去改善他们农作物,果树和葡萄,的种植规模和品质

耶鲁公开课 - 古希腊历史简介课程节选