The bill seemed to curl up as if it had been rolled and stuck into the end of a gun barrel.

VOA: special.2009.11.14

And I rolled up the window and before you know it " he had punched out the window."

我讲车窗门拉起,没等我反应过来,他一拳就砸在了玻璃上“

耶鲁公开课 - 心理学导论课程节选

This tube, this hollow tube, which food passes through is made up of many, many epithelial cells which directly abut one another and would be a flat sheet except that it's rolled up into a tube.

这个管道,这个中空的管道,食物可以穿行其中,而它就是由许多许多上皮细胞构成的,上皮细胞一个连着一个,形成了一个平坦的细胞层,但实际上它们还在肠管中卷成管状

耶鲁公开课 - 生物医学工程探索课程节选