These are all plausible reasons and possible contributors but nobody's got the home run answer yet.

这些原因听起来都很有道理,但还没有人能给出准确的答案

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

You take it home and you write basically an 8-page, we don't want you to run outside and do research.

回家写大约8页隔行的论文，你不用到外面做调查。

耶鲁公开课 - 新约课程节选