唯一的要求是你选的题目必须与你的研究科目有关。

The only stipulation is that the topic you choose must be related to your studies.

《牛津词典》

案例研究法对于一些科目的作用会比另一些科目更有效(例如，案例研究法也许不会对财政和策略一样有效)。

It works better for certain subjects than others (ex. the case method might not be as useful for finance as for strategy).

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连他的消遣都是放下一个科目又拿起另一个科目的变换研究。

Even his recreation consisted in change of study, laying down one subject to take up another.

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OCW Self learners are coming to OCW to explore whole new areas of study as well as to brush up on subjects that they took a while ago and perhaps got the rest in the end.

自学者浏览,搜索全新领域的研究,补充学过的科目的知识,使之完整。

麻省理工公开课 - 媒体、教育、市场课程节选