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扫描并绘制吉萨金字塔群地图的科学家们称，他们发现吉萨大金字塔并不完全对称。

Scientists scanning and mapping the Giza pyramids say they've discovered that the Great Pyramid of Giza is not exactly even.

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So when we talk about a cohort study, this means taking a group of people and following them over time.

所以当我们提到定群研究,就意味着,有一群人参加实验并需一直追踪下去

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

But this antigen presenting cell is more likely a professional antigen presenting cell, or a subset of cells of your immune system that are specialized in ingesting foreign particles and displaying their contents to the rest of the immune system.

但这种抗原呈递细胞更加类似于,专职抗原呈递细胞,或者是体内免疫细胞中的一个亚群,专门从事吞噬异己物质,并告知免疫系统的其他细胞的工作

耶鲁公开课 - 生物医学工程探索课程节选

We begin to know more about three or four hundred years down the road, when there appear buildings and settlements in the world later inhabited by the Greeks, as we know, to which we give the name Mycenaean.

约三四百年之后当这块希腊人聚居的土地,出现了建筑和住宅群,我们才开始对它有了更多的了解,并将其命名为今天人人皆知的"迈锡尼文明"

耶鲁公开课 - 古希腊历史简介课程节选