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

我是说，你想得到基本字符集，但它只有一步之遥。

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

但是，字符集真的太小了，无法做常复杂的事情。

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，我们极大地简化了过程，去除了阻碍，现在字符串可以大范围替换字符集了。

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

允许像 DOS 示例样的华丽界面，它完全基于您刚刚看到的字符集构建。

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，添加了新的半图形字符，如 IBM 的 CP437 字符集，在里看到，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，作者构想了一巨大的图书馆形式的宇宙， 其中包含所有可能的 410 页特定格式和字符集的书籍。