ground plane

基本解释

The scene contains a ground plane, a few boxes and some text, to make sure I use all kinds of geometry.
这个场景包括一个地平面，一些方盒子，一些文字，这样来确保我使用了多种几何体。
Listing 1 illustrates the process of creating a simple world occupied by a box (in the with upward momentum) and a ground plane.
清单 1 展示了创建一个由立方体（具有向上动力）和地平面占据的简单世界的过程。
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（逃离）景观”，eVolo中的一个词条，是他们要造高于海面70米的新陆地的建议，这是一个要通向已有的摩天大楼的新的地平面。

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.
可以得到物体相对于地面的速度,物体相对于平面的速度,物体相对于地面的速度
耶鲁公开课 - 基础物理课程节选
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.
当你在运动的飞机上运动,然后你想找到相对于地面的速度,你就应该给每个物体加上,飞机相对于地面的速度
耶鲁公开课 - 基础物理课程节选

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