I walked along the outer edge of the track.

我沿着跑道的外缘走。

《牛津词典》

Travel by train on the Western line and you'll see them: rows of lettuce and other greens grown on the edge of the railway track using fertilizer of dubious provenance.

乘火车沿着西线一路向前，你就会看到火车轨道边缘生长的成排的生菜和其他绿色植物，而那用的肥料却总能使我们产生怀疑。

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When a round object rolls along a straight line, a track on the round edge is called a roulette or a cycloid.

当一个圆沿着一条直线滚动时，圆边上一点的轨迹叫做旋轮线或摆线。

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For a company whose image has grown staid in recent years--its mainstay is still printers and computers and the company largely missed out on the first big Internet wave--HP is trying to get back on the cutting edge track.

FORBES: Magazine Article

Titled "Losing My Edge, " the track offers a tongue-in-cheek look at the DJ culture that catapulted Murphy to underground fame.

NPR: LCD Soundsystem: A Music Geek Makes Good

Two sensors along the bottom edge of the tablet track both of your eyes and after a slightly laborious configuration setup, we were able to tour around the prototype slabs features without laying a finger on it.

ENGADGET: NTT DoCoMo's i beam tablet prototype is driven by your eyes (video)