For earthbound creatures like us , flight just seems so fantastical .

对我们这种只能在地面上活动的生物来说，飞行简直太神奇了。

When it came to earthbound applications , the technology was slower to take off .

这一技术在应用到地面时却发展的慢一些。

They 'll be earthbound forever .

他们将永远成为被束缚的鬼魂。

Indeed the structures of flight vehicles are very flexible when compared with bridges , buildings , and earthbound machines .

实际上，与桥梁、建筑和地面上的机器相比，飞行器结构是非常灵活的。

He practised the art of earthbound realism .

他实践生根于土壤的现实主义艺术。