什么是3D在这个HTML中做？ [英] What's a 3D doing in this HTML?

问题描述

我想通过查看其代码来复制我进入我的gmail的邮件。我在多个源查看器中看到很多这样的内容：

I'm trying to duplicate a mailer I got into my gmail by taking a look at its code. I see a lot of this in multiple source viewers:

 <td style=3D"border-bottom: 1px dotted rgb(153,157, 147); border-top: 1px solid rgb(28, 140, 78);" width=3D"90">=A0</td>
 <td style=3D"border-bottom: 1px dotted rgb(153,157, 147); border-top: 1px solid rgb(28, 140, 78);" align=3D"right" width=3D"110">

3D是不是我不知道的邮件渲染的东西？

Is 3D some sort of mail rendering thing I don't know about?

推荐答案

这是一个电子邮件编码系统，名为 quoted-可打印，其允许非ASCII字符表示为用于电子邮件传输的ASCII。

It's an email encoding system called "quoted-printable", which allows non-ASCII characters to be represented as ASCII for email transportation.

在引用可打印时，表示任何非标准的电子邮件八位字节作为 = 符号后跟两个十六进制数字表示八位字节的值。当然，为了在电子邮件中表示一个简单的 = ，它需要使用quoted-printable编码来表示：3D是对应于 = 的ASCII值（61）。

In quoted-printable, any non-standard email octets are represented as an = sign followed by two hex digits representing the octet's value. Of course, to represent a plain = in email, it needs to be represented using quoted-printable encoding too: 3D are the hex digits corresponding to ='s ASCII value (61).

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