It was a return to his roots. He began his work in the 1940s in Mexico, breeding wheat crops that were immune to another type of wheat rustthat had devastated crops there.

VOA: standard.2009.09.16

You know, if you're wandering through Harvard Square and you see an out-of-work Harvard grad, they're handing out examples of square roots, they'll give you an example and you can test it to see is the square root of 2, 1.41529 or whatever.

你知道，如果你从哈佛校园里穿过去,你看见了一个失业校友，正在派发平方根的示例，他们会给你一个例子,而你会检查2的平方根是1。41529或者别的什么。

麻省理工公开课 - 计算机科学及编程导论课程节选

This move roots Frost's poetry of work in the lives of rural workers, people who have to sustain and entertain themselves, often on their own or alone.

这运动将弗罗斯特的诗歌扎根进,乡村工人的生活中，扎根进必须独自，支撑和娱乐他们自己的人中。

耶鲁公开课 - 现代诗歌课程节选