An astronomer at Harvard College, Henrietta Leavitt, had discovered that these periods of brightness could be used to measure the star's distance from Earth.

VOA: special.2009.04.29

Harvard college was a wonderful experience for me.

哈佛大学的日子是一段难忘的记忆。

普林斯顿公开课 - 人性课程节选

He taught at Harvard University and the City College of New York.

VOA: special.2009.03.01