This gives every point on earth a unique permanent address.

这为地球上的每一点提供了一个唯一的永久地址。

This unique address is put into a header that prefixes any data sent over the network.

这个唯一的地址被放入一个标头中，该标头作为通过网络发送的任何数据的前缀。

To solve this problem, Ethernet requires that each computer has a unique Media Access Control address, or MAC address.

为了解决这个问题，以太网要求每台计算机都有一个唯一的媒体访问控制地址，即 MAC 地址。

In order for pages to link to one another, each hypertext page needs a unique address.

为了让页面相互链接，每个超文本页面都需要一个唯一的地址。

This works really well; every computer made today comes with its own unique MAC address for both Ethernet and WiFi.

这真的很好用；今天制造的每台计算机都有自己唯一的以太网和 WiFi MAC 地址。

Those who blog, bloggers, carry out the activity of blogging, setting up a blog site, with a unique web address in order to do so.

发表博客的人叫做bloggers——博主，他们会写博客，会有自己的博客网页，要这样的话就会有个独一无二的网址。

It's a lot like sending physical mail through the postal system – every letter needs a unique and legible address written on it, and there are limits to the size and weight of packages.

这很像通过邮政系统发送实体邮件——每封信都需要一个独特且清晰的地址，并且对包裹的大小和重量有限制。