But for those of you who decide to go on in computer science realize there is a whole interesting world that uses details like these in the world of networking, in hardware, to actually solve some real world problems.

而对于你们中想要在计算机科学,方面有所发展的人，将会遇到一个非常有趣的领域,在那个世界里，会有许多像网络世界，硬件界,这样或那样的小细节，但又往往是这些小细节才解决了许多真实世界里的问题。

哈佛公开课 - 计算机科学课程节选

So there couldn't be a world in which the Evening Star exists, but the Morning Star doesn't, because that would be a world in which Venus exists and Venus doesn't exist.

所以不可能有一个世界昏星存在,而晨星不存在,因为那意味着在那个世界里金星存在,而同时金星不存在

耶鲁公开课 - 死亡课程节选

It's rather, "Can you imagine a world in which the very thing that you really are picking out when you refer to me by the name Shelly-- namely this thing-- can you imagine a world in which that thing exists, but the thing that you're picking up when you use the word Kagan does not exist?"

而是在于,你能不能想象在一个世界里,你用薛立这个名字,指的那个人,也就是这个东西,你能不能想象在一个世界里某个东西存在,而你用卡根这个词,所指的这个东西却不存在

耶鲁公开课 - 死亡课程节选