Because what you don't see in this file is any code a that actually says put a letter of the alphabet at the top left hand corner of the screen and then put the next character to the right in other words, I'm taking for granted at this moment in time that my computer knows how to print something to the screen.

就是这些你在本文件中看不到的一些代码,实现了将首字母,放在屏幕的左上角,然后把其他字母加在其右边，我想当然地认为,我的电脑知道如何打印相应信息到屏幕上。

哈佛公开课 - 计算机科学课程节选

So, I did some reading quickly and she looked at the screen for a moment and then I suggested we hit the top right button to purchase new Charlie Ticket, whatever that is, value tickets and passes.

所以，我快速阅读了一下，她看着屏幕一段时间,然后我建议点击右上边的按钮,来买一张新的Charlie票，不管怎样，那是一张有值票，可以通过。

哈佛公开课 - 计算机科学课程节选