未占轨道叫虚轨道。

The unoccupied orbital are called virtual orbitals.

youdao

未占轨道叫虚轨道。

The unoccupied orbital are called virtual orbitals .

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未占轨道叫虚轨道。

Not running on tracks or rails.

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轨道底面与地面必须紧密着力，不得有虚跨间隙，以防止地轨轨道载荷后弯曲变形。

Orbital floor and must closely focus on the ground, in order to prevent the ground rail track bending deformation after loading.

youdao

轨道底面与地面必须紧密着力，不得有虚跨间隙，以防止地轨轨道载荷后弯曲变形。

Orbital floor and must closely focus on the ground, in order to prevent the ground rail track bending deformation after loading.

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