No, instead we have to click other amount at bottom right there, when we have to input 4-0-0 in this screen 4-0-0 after consulting visually the little cheat sheet on the device itself it tells you in a very long chart how much one pass costs so we multiply and type in 4-0-0, we hit enter.

不，然而我们必须点击,右下边的这个，当我们需要在这个屏幕上,输入0,通过咨询那个设备上小说明,它在一个很长的图表上,告诉你，每一站需要多少钱，我们加起来,输入了4-0-0，点击输入。

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