ground plane

基本解釋

The scene contains a ground plane, a few boxes and some text, to make sure I use all kinds of geometry.
這個場景包括一個地平面，一些方盒子，一些文字，這樣來確保我使用了多種幾何體。
Listing 1 illustrates the process of creating a simple world occupied by a box (in the with upward momentum) and a ground plane.
清單 1 展示了創(chuàng)建一個由立方體（具有向上動力）和地平面占據(jù)的簡單世界的過程。
City(e)scape, an eVolo entry, is their proposal for a new landscape built 70 meters above the water and attached to existing skyscrapers, creating a new ground plane.
“城市（逃離）景觀”，eVolo中的一個詞條，是他們要造高于海面70米的新陸地的建議，這是一個要通向已有的摩天大樓的新的地平面。

The pilot gets on his radio and calls "mayday,mayday,mayday" to tell that his plane is in danger of crashing to the ground.
That'll say the velocity of the object with respect to the ground, the velocity of the object with respect to the plane, the velocity of the plane with respect to the ground.
可以得到物體相對于地面的速度,物體相對于平面的速度,物體相對于地面的速度
耶魯公開課 - 基礎(chǔ)物理課程節(jié)選
When you have a velocity in the moving plane frame and you want to find the velocity on the ground, you should add to every object in the plane the velocity of the plane with respect to the ground.
當(dāng)你在運動的飛機上運動,然后你想找到相對于地面的速度,你就應(yīng)該給每個物體加上,飛機相對于地面的速度
耶魯公開課 - 基礎(chǔ)物理課程節(jié)選

Several Dreamliners experienced battery problems, prompting global watchdogs to ground the plane.
FORBES: Boeing Hits Fresh Highs As FAA Approves 787 Battery Fix Plans Amid Reports Of a $15B Order