The hidden text field gives me a place to store the id of the Airport when the entire form is submitted back to the server.

当整个表单提交到服务器时，隐藏的文本字段提供了一个存储Airport的id的位置。

youdao

The foundation had clearly stated its goal to restore, preserve, and publish the long-hidden text and then return the original to its country of origin.

该基金会清楚地声明了它的目的：修复、保存、出版这份长期失传的手稿并把原件送回原地。

youdao

If you later wanted part of the text in the slogan div to be graphical, and another part-say a sub-title or elaboration-to remain normal text, you could surround just the hidden text within a span.

如果您以后希望标语div内的部分文本是图像，并且另一部分—比如副标题或说明性文字—保持为普通文本，您可以仅将隐藏的文本放置在span内部。

youdao

That should reveal most of the hidden text.

ECONOMIST: The Archimedes palimpsest