The resulting Möbius strip, which has only one surface and one boundary edge, is an example of a topological form.

由此产生的莫比乌斯带，它只有一个面和一个边界的边缘，是一个拓扑形态为例。

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In some technologies, power and ground pins extend to the edge or outside the boundary.

在有些技术上，电源和接地引脚会伸出到边界或者边界外面。

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The gardens extend to the footpath edge with the boundary fence absorbed by planting.

花园延伸到人行道的边缘，边界栅栏布满了植物。

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Youvraj and Dhoni could only sit helplessly on the boundary edge as Jadeja struggled to keep up with the scoring rate.

BBC: Jonathan Agnew column

Twenty20 cricket, which involves batsmen sitting on the boundary edge waiting to go in and bowlers given reduced time to get through their overs, was first launched in county cricket in 2002.

BBC: David Hussey

When Umar, who struck a terrific six wide of long on off Swann, was brilliantly caught by Pietersen in front of the Pakistan dug-out following a 30-yard sprint along the boundary edge, Pakistan were 118-6 with barely three overs to go.

BBC: Kevin Pietersen fires England to Super Eights victory