First let me back up a bit and talk about vision correction before the printing press.

让我先回顾下在印刷术之前的视力矫正是什么样的。

youdao

Once the printing of unbacked money slows down or stops altogether, this stops the flow of real savings to various activities that emerged on the back of unbacked money.

一旦减缓或者停止印刷没有支撑的纸币，这将停止真实的储蓄流向由没有支撑的纸币引发的各种活动。

youdao

Most processes can trace their roots back to the earliest form of 3-d printing: stereolithography.

大部分的程序都是来源于最早的3 - D打印机的模式：立体平版打印机。

youdao

OK, what I would like you to see is I've been printing out, as I went along, actually let's back up slightly and look at the code. There's merge sort.

好的，我想让你们看就是我运行过后,打印出来的结果，我们再回头看一下这段代码,这就是归并排序，输入一个列表。

麻省理工公开课 - 计算机科学及编程导论课程节选

It's in response to what seems to have been an aesthetic reaction to the poem that the printer of Paradise Lost asked Milton, went back to Milton and asked him to append a note to the book's second printing -- to append a note that explains why the poem rhymes not.

这是弥尔顿对《失乐园》的出版商的答复,出版商问弥尔顿关于此诗的美学问题，他找到弥尔顿，让他给此诗的第二次印刷附一个,注解--附个注解解释这诗为什么不押韵。

耶鲁公开课 - 弥尔顿课程节选

The project makes Nokia one of the first big electronics firms to seriously back 3D printing.

BBC: Nokia backs 3D printing for mobile phone cases

Once central bankers are finally forced to confront the inflation they created, they throttle back on the printing press.

FORBES: Deflation Isn't The Enemy

Kodak made something of a splash when it challenged the prevailing business model in the printing world back in 2007.

FORBES: Kodak: Is Everyone Fearful Enough Yet?