It's only about three feet wide.

桥宽仅三尺左右。

youdao

As narrow as three feet wide and a thousand feet deep, few people have ever had the courage to descend into this mysterious world.

宽度只有窄窄的三英尺，深达千尺，只有很少人有勇气深入到这个神秘的世界里去一探究竟。

youdao

Of course, as with all illusions, all is not quite as it appears: The folly is only three feet wide, its supposed depth exaggerated with a trick of perspective.

当然，所有的这些视错觉，并不是那么不可觉察的，三英尺的距离便能让这些所谓的透视把戏一切真相大白。

youdao

Six feet deep and three feet wide.

VOA: special.2010.03.25

It's only about three feet wide.

桥宽仅三尺左右。

耶鲁公开课 - 心理学导论课程节选

There were some twelve to fifteen different widths of railroads in the Northern states alone by the 1850s, and you could go into one town on a gauge, i don't know, three feet wide but on the other side of town it would come out four feet wide.

在五十年代,单就北方州的铁道,就有十二到十五种不同的轨距,你可能在一条三英尺宽的铁道上进镇,但在另一边出镇时,它变成四英尺宽了

耶鲁公开课 - 美国内战与重建课程节选

The unmanned aircraft, described by the FBI as black and no more than three feet wide with four propellers, came within 200 feet of the Boeing jetliner.

CNN: Drone came within 200 feet of airliner over New York

Crews dug a trench three feet wide down to bedrock.

FORBES: The Bathtub. Lower Manhattan's Wall Against Water.

Imagine an iPhone for a giant: Jeff Han, a research scientist, has built an amazing interactive touch-screen wall, eight feet wide and three feet high.

FORBES: Radical Ideas