Visitors walk through a ninety-one meter glass tube.

VOA: special.2010.08.13

scratch Scratch is a program that you can download for free cs50 net and you will see in problem set 0 0 which will be posted on CS50.nettonight under problem sets in both standard and hacker editions, can you do the--can you--it will walk you through the process of getting this software.

你可以免费下载,今天晚上我会在0,放上习套题,这个习题集有两个版本，习题集可以指导你,如何下载这个软件。

哈佛公开课 - 计算机科学课程节选

The extended-through-space train I pick out at the end of our walk is the same as the extended-through-space train that I picked out at the beginning of our walk.

走到末尾的时候,我谈到的贯穿空间的火车,和一开始我谈到的,是同一辆。

耶鲁公开课 - 死亡课程节选