Among the many images of the famous mill girls is this one, taken in 1850,I believe, in Lowell, Massachusetts.

在众多图片中,著名的纺织女工是其中之一,大概拍摄于1850年,在洛威尔纺织厂,马萨诸塞州

耶鲁公开课 - 美国内战与重建课程节选

As you can tell from the cameras, the course is in fact filmed for reasons of distance education and your benefit for review; we've been working on this past summer what we dubbed cs50.tv which is our own delivery mechanism for these videos.

你们从大屏幕上可以看出来,该课程实际上是为远程教育拍摄的,你们能够在评论的过程中获益良多,今年夏天我们一直忙于cs50。tv网站的事,这样，拍摄完的视频就可以上传到这个网站。

哈佛公开课 - 计算机科学课程节选