You have- and another example of that that would be true, is let's say you have a child who lives in this sort of circular area here, who lives here and his friends with a child who lives here.

我们还有个现实案例,假如你有个小孩,居住在我画圈的这块区域,他住在这儿,而他的朋友们住在这儿

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

In particular, we're going to focus today on sort of how to manipulate and use DNA in some applications, and this is a huge area of science and technology.

特别是,我们今天要重点讲,如何操作DNA并应用它们,这是一个十分广阔的科学技术领域

耶鲁公开课 - 生物医学工程探索课程节选