Numerical simulation was used to study the influence of profile shape, vehicle speed, wheel back distance and rail cant on the wear depth and wear distribution of wheel profile.

采用数值仿真方法研究了不同车轮踏面外形、轮对内侧距、轨底坡和车速对踏面磨耗深度和磨耗分布的影响。

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A new law specified that houses must be a certain distance back from the water.

一项新法律详细规定了房子必须与水域相隔一定的距离。

《柯林斯英汉双解大词典》

They can tell the distance of various objects by how quickly the sound waves bounce back off them.

他们可以通过声波反弹的速度来判断不同物体之间的距离。

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Specifically designed to take advantage of the camera's mirrorless design, the X-Mount has a short flange back distance of just 17.7mm made possible by designing the mount ring as thin as 2.5mm.

ENGADGET: Fujifilm grows X-series mirrorless lineup with 16.3-megapixel X-E1

This means the rear lens elements are as close as possible to the sensor, reducing the back focus distance of each lens to the minimum possible, thus achieving high resolution from edge to edge.

ENGADGET: Fujifilm grows X-series mirrorless lineup with 16.3-megapixel X-E1

We're even told that we should sit a prescribed distance back, usually the dead center of the auditorium.

WSJ: A Front-Row Seat at the Movies