This machine should be fixed on a plane surface.

这个机器应该固定在平面上。

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The outdoor arena is a plane surface surrounded by walls with three levels of balconies on each side.

室外的领域是平面的围墙包围三个层次的阳台，每边。

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An optical device that projects a virtual image of an object onto a plane surface, especially for tracing.

一种光学装置，可将物体虚像投影到一平面之上，多用于跟踪。

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"The fact that the plane landed on a soft surface and that there was no fire helped keep the number of fatalities low, " he said.

BBC: Turkish plane crash in Amsterdam

By using lightweight aerospace materials like carbon fiber, which has the strength of steel but weighs a fifth as much, naval architects can design boats that plane across the surface of the water instead of plowing through it.

FORBES: Mine's Lighter

This is a special type of Earth model which traces its idealised "horizontal" surface - the plane on which, at any point, the pull of gravity is perpendicular to it.

BBC: Europe's Goce satellite probes Earth's gravity