They have a substantial reality within the fictional context, the mimetic context, of this epic. These are angels.

他们在这篇史诗虚构的模仿得来的，内容中具有极大的现实意义，他们是天使。

耶鲁公开课 - 弥尔顿课程节选

Do we offer what we dub packer editions of problem sets which extensively cover the same material but with a more technical sophistication, with more detail, and these are simply options that students in this course can elect as per the syllabus.

我们提供涵盖同样内容,但具有更多技术性细节的,我们称之为习题包，其中有更详细的信息,这些只是按照教学大纲的要求让同学们可以自主选择。

哈佛公开课 - 计算机科学课程节选

s very powerfully written, moving and persuasive.

内容生动有力，It’,感人且具有说服力。

普林斯顿公开课 - 国际座谈会课程节选