Markdown 什么'；这是标记命名链接的rst等价物？

在markdown中，我可以这样做：

Imagine a long paragraph here, with [an extended phrase linked
to something elsewhere][shortref].

[shortref]: http://really-long-and-annoying-link-here

StructuredText中的等效语法是什么？

您可以使用替换和对相应超链接目标的引用来定义

Imagine a long paragraph here, with |SR|_.

.. |SR| replace:: an extended phrase linked to something elsewhere
.. _SR: http://really-long-and-annoying-link-here

另一个选项不是完全等效的，但仍然很接近：

Imagine a long paragraph here, with `an extended phrase linked
to something elsewhere`_.

Here is a short reference link: `shortref`_.

.. _shortref: `an extended phrase linked to something elsewhere`_
.. _an extended phrase linked to something elsewhere: http://really-long-and-annoying-link-here

上面的示例使用了以下方法的组合