Maybe the ground vibrates, or maybe the ground itself is shifting, tilting.
也许是地面震动了，或者是地面本身在移动和倾斜。
2
The earth's not always the same distance from the sun, and it's not always tilting toward the sun at the same angle.
地球到太阳的距离并不总是相同的，地球也并不总是以相同的角度倾斜向太阳。
3
Numerous ideas were submitted for the project, including concepts ranging from rolling eggs to tilting tanks, from giant seesaws to overhead monorails.