flat surface

基本解釋

He hunkers down by the pit and rakes away the earth from a blackened flat surface with his fingers.
他在坑邊盤坐下來，用手指從一個平整的暗色表面上把土扒開。
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.
所有的帆船都為了這個理由需要某種龍骨：狹窄平滑的龍骨表面對于帆船的前行幾乎沒有阻力，但卻能很好抗拒側(cè)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.
（給艙室注射水使檢測器表面回復(fù)平坦）注射水進入透鏡艙室使得薄膜變成凹半球。

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》中的計算模型參數(shù)僅考慮平面和縱面線形得出運行速度,無法體現(xiàn)車流實際運行狀態(tài),且計算結(jié)果普遍偏高。
物理學(xué)
平面