Pulling this lever or pushing the button would actually rotate the paper enough so that you'd be on a new line and it would also move the little imprinting head that prints the letters of the alphabet and such all the way to the left.

拉杆或按下按钮会让纸翻一下,这样你就能在新的一行上打字了,同时移动打印字母的,压印头,这样也能移到最左边。

哈佛公开课 - 计算机科学课程节选

So, main meanwhile is going to change, but let's fast forward to the end just to confirm that all I did was copy and paste what was on the slide a moment ago.

所以，main同时要改变，快速翻到末端,来确认，我刚才所做的就是,在面板上复制粘贴。

哈佛公开课 - 计算机科学课程节选