So, in order to have fast transmission you do that by transmitting electrical signals; that happens pretty quickly.

所以 为了使信号迅速地传播,细胞使用电信号,它速度非常快

耶鲁公开课 - 生物医学工程探索课程节选

What we're talking about is literariness--that is to say, certain devices that we can identify that perform a certain function -and maybe out of the identification of these devices, to evolve a theory that's more widespread.

我们谈的是文学性，是一种我们能够认知并运用来达到一定目的的策略,我们需要进一步发展这个策略，使这个理论进化并传播。

耶鲁公开课 - 文学理论导论课程节选

The barriers to unity presented by European geography and very limited technology made it hard for a would-be conqueror to create a vast empire, eliminating competitors and imposing his will over vast areas.

由于欧洲独特的地理条件,和当时有限的科技水平,使未来的征伐者很难建立一个广袤的帝国,清除异己和使他的意志,传播到广袤领地的每一个角落

耶鲁公开课 - 古希腊历史简介课程节选