The code pages have unique encoding schemes that define a range of values for the graphic and control characters.

编码页面有唯一的编码计划，为图形和控制字符定义了一系列值。

youdao

Data URIs do take up a lot of space, especially given the usual encoding schemes, and they can clutter up XML files.

数据 URI 的确要占有很多空间，尤其是在特定常用的编码模式下更是如此，而且这会打乱 XML 文件的结构。

youdao

It first explained key concepts such as code pages, code points, and encoding schemes, and indicated how to review their current value, and how to update the value.

它首先解释了诸如代码页、代码点和编码模式等关键概念，并说明了如何查看它们的当前值以及如何更新该值。

youdao

That's pretty good 'cause now, I can pretty much cover my American keyboard pretty effectively both upper case, lower case, and a whole bunch of punctuation. For other languages as in aside, there are other encoding schemes when there are more characters.

那是相当不错的，它可以包含整个美式键盘中的字符,包括大小写字母和一连串标点,对于其他语言，当涉及更多字符时就会有其他的编码体系。

哈佛公开课 - 计算机科学课程节选