In the Ancient Near East, destroyed cities tended to be leveled, and then a new city would just be built on top of the ruins, Tell Dor each one of those is called a tell These are mounds which represent the successive layers of destroyed and rebuilt cities.

在古代近东地区，被摧毁的城市一般较平坦，那么新城就可以建于废墟之上，这些土丘被称作“退尔“你们也许听过,这些就是小土丘,它们代表着一层层被摧毁又重建的城市。

耶鲁公开课 - 旧约导论课程节选

This slide shows one important feature of the physical chemistry of DNA that turns out to be very important for all of the technology that is built on DNA.

这张幻灯片展示了,DNA非常重要的理化特性,这些特性,对于所有以DNA为基础的技术很重要

耶鲁公开课 - 生物医学工程探索课程节选