A grand staircase, or tiered seating, ensures a fluid connection between the base plane (ground floor) with level above, while offering a congregational space.

一个宽大的楼梯，或休息平台，连接了不同的楼层，从而使得空间得以流动，同时提供了一处聚集的空间。

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The pilot gets on his radio and calls "mayday,mayday,mayday" to tell that his plane is in danger of crashing to the ground.

VOA: special.2010.04.18

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

As the plane neared the ground at a much-too-fast speed, passengers were warned to brace for impact.

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Several Dreamliners experienced battery problems, prompting global watchdogs to ground the plane.

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There are a number of airlines where the entire business model is driven by reducing the amount of time the plane spends on the ground.

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