Unlike the real world, 3d computing gives you two more view boundaries: near and far clipping planes.

与真实世界中的情况不同，3d计算给我们增加了两个视图边界：近切割面和远切割面。

youdao

We view our world through frames of understanding, the boundaries fixed by agreed narrative.

BBC: How Britain rediscovered its forgotten confidence

You can search for your ZIP code (and its boundaries) in our interactive graphic, view the list of the five hundred most expensive ZIPs, or click through a slide show of homes in the 25 most expensive ZIPs.

FORBES: The New High-Status ZIP Codes

B's point of view, it looks as though a nationalised corporation is extending itself beyond its traditional boundaries, using public money to move into a market served by a small commercial operation which it threatens to destroy by undercutting.

ECONOMIST: 24-hour news