This is the kinetic energy for something in orbit at this radius, and this is the potential energy.
这是在轨道内这个，半径的物体的动能，这是势能。
Using the periodic orbit theory, we computed the quantum level density of a particle in the two-dimensional harmonic oscillator potential with and without the magnetic flux line for different cases.
利用周期轨道理论，我们计算了在不同情况下，一个粒子在二维谐振子势中存在和不存在磁通量时的量子能级密度。
Its ability to land on a runway means it has the potential to be used to routinely loft instruments to space and bring them back, or even to retrieve objects already in orbit.
飞机能够降落在跑道上，也就意味着未来可用于定期将仪器送入太空并载回地面，甚至可以用来收回先前在轨道上的物体。
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