flat surface

基本解释

He hunkers down by the pit and rakes away the earth from a blackened flat surface with his fingers.
他在坑边盘坐下来，用手指从一个平整的暗色表面上把土扒开。
All sailboats need a keel of board for this reason: the narrow, flat surface of the board or keel produces little drag when the boat moves forward but resists motion sideways.
所有的帆船都为了这个理由需要某种龙骨：狭窄平滑的龙骨表面对于帆船的前行几乎没有阻力，但却能很好抗拒侧移力。
(Injecting water back returns the detector to a flat surface.) Injecting water into the chamber of the lens makes the thin membrane become a convex hemisphere.
（给舱室注射水使检测器表面回复平坦）注射水进入透镜舱室使得薄膜变成凹半球。

It is a small device that you move around on a flat surface in front of a computer.
The artist draws an image with oily ink onto a piece of stone or other flat surface.
"Well,one of the things that's interesting about these flexible sheets is that they can be curved, so you could imagine putting them in unconventional forms, like on the surface of a vehicle or something like that, where you don't have a flat surface."

Set the flat end on a perfectly flat surface, and a bubble of air points straight up.
FORBES

平面
However, the "Guide" in the model parameters only considers the flat surface and vertical line drawn speed can not reflect the actual traffic running, and the results is generally high.
然而《指南》中的计算模型参数仅考虑平面和纵面线形得出运行速度,无法体现车流实际运行状态,且计算结果普遍偏高。
物理学
平面