The Visitor in Listing 3 produces a map that associates each external page with a list of internal pages that link to it.

清单 3 中的 Visitor 生成一个映射，将每一个外部页面与链接它的一组内部页面相关联。

youdao

To transfer instructions, data, or both, between real storage and external page storage.

在实存储器和外部页式存储器之间传送指令、数据或指令和数据。

youdao

And because the shopping experience is integrated into the app, there's no need to launch an external browser or visit a Web page to download or complete a purchase.

ENGADGET: Nook app comes to Windows 8 with clean Paper-like design

With one connecting wire and a one-page owner's manual -- and no external speakers or wires -- these are the simplest home theater systems ever invented.

ENGADGET: ZVOX intros three new Z-Base models, lowers the pricing soundbar