人类可以很容易地定位房间里的其他物体，而机器人几乎不可能完成这项任务。
Humans orient themselves with other objects in a room very easily, Robots find the task almost impossible.
然而因为时空本身是在能层里移动，物体保持在固定位置是不可能的。
However, because space-time itself is moving in the ergosphere, it is impossible for objects to remain in a fixed position.
除非不可能，我们一生的满足均取决于我们把困难定位到怎样的高度。
Short of the impossible, the satisfactions we get from a lifetime depend on how high we place our difficulties.
在滩浅海地震勘探中，由于海水深度和潮流的变化，在水面上按照预定位置沉放的检波器，在海底不可能放置在预定的位置。
Because of the variation of seawater depth and tide, the detector placed in the seafloor cannot be located in the designed position during seismic exploration in the paralic zone.
在滩浅海地震勘探中，由于海水深度和潮流的变化，在水面上按照预定位置沉放的检波器，在海底不可能放置在预定的位置。
Because of the variation of seawater depth and tide, the detector placed in the seafloor cannot be located in the designed position during seismic exploration in the paralic zone.
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