But since the St.John's curriculum aims to span almost all of Western culture, students study every branch of the liberal arts - including music.

VOA: standard.2010.05.12

Instead, he's known for the development of an encompassing theory of mind, one that he developed over the span of many decades.

相反，他却因为提出了极具包容性的,心理理论而闻名天下，这个理论是他通过数十年的研究才提出的。

耶鲁公开课 - 心理学导论课程节选

Here in the U.S., the rate of obesity doubled over a span of 16 years.

VOA: standard.2010.08.10