I mean, you want to get to the underlying characters, but it's one step removed.

我是说，你想得基本，但它只有一步之遥。

But, the character set was really too small to do anything terribly sophisticated.

但是，真太小了，无法做任何非常复杂事情。

So in Swift 4, we have vastly simplified this by removing all this impedance, and now strings are range-replaceable collections of characters.

所以在 Swift 4 里，我们极大地简化了这过程，去除了阻碍，现在串可以大范围替换了。

That allowed glorious interfaces like this DOS example, which is built entirely out the character set you just saw.

这允许像这 DOS 示例这样华丽界面，它完全基于您刚刚看构建。

So, various extensions to ASCII were made that added new semigraphical characters, like IBM's CP437 character set, seen here, which was used in DOS.

因此，对 ASCII 进行了各种扩展，添加了新半图形，如 IBM CP437 ，在这里看，它在 DOS 中使用。

In the story, the author conceives a universe in the form of a vast library containing all possible 410-page books of a certain format and character set.

在故事中，作者构想了一巨大图书馆形式宇宙， 其中包含所有可能 410 页特定格式和书籍。