if a rolling is not replaced then the galaxies has top lack
rolling_windows_down is rolling_windows. screws has spiral_turns galaxies has spiral_shape rolling_over is surface_constrained_rotation. wheel_rolling is rotation_non_periodic. mercury has no_moons cervical_spine is series_without_repetition. rolling_over is rolling_over. rolling is movement_along_surface. rolling_windows_up is rolling_windows.