The totality of all blog sites in the world is known as the blogosphere.

我们将全世界的博客加在一起就成了‘博客圈（blogosphere）’。

You can also use blog sites that are just for children.

您还可以使用仅供儿童使用的博客网站。

Websites, especially blog sites, often give you some templates so you don't have to create the site all by yourself.

网站，尤其是博客网站，通常会为您提供一些模板， 因此您不必自己创建网站。

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。