Only administrators see the default behavior, which consists of a link in the left navigation bar that goes to the front page of the Edit Layout section.

只有管理员可以看到缺省状态，这由一个左边导航条内的链接组成，该链接通往Edit Layout部分的头版。

youdao

With BMW for instance, consumers can visit a Web page and print off a simple bar code which they then show in front of their Web cam.

FORBES: New iPhone App Takes Augmented Reality To Next Level