Also, the definition of reference remains simple: it doesn't have to redeclare any of the content that it shares with topic.

此外，reference的定义仍然很简单，不需要声明与topic相同的任何内容。

youdao

They are defined in every JSP page and used behind the scenes by the container whether you declare them or not — although you cannot redeclare them.

不论您是否声明它们——虽然您不能重复声明它们，它们在每个jsp页面当中都进行定义，并且在后台由容器使用。

youdao

They are defined in every JSP page and used behind the scenes by the container whether you declare them or not — although you cannot redeclare them.

不论您是否声明它们——虽然您不能重复声明它们，它们在每个jsp页面当中都进行定义，并且在后台由容器使用。

youdao