Complex sentence: When some of this is removed, the superfluid transition occurs at a lower temperature, suggesting that the superflow is involved with actual fluid moving along imperfections in the crystal rather than a property of the perfect crystal.
Split into simpler sentences: When some of this is removed, the superfluid transition occurs at a lower temperature. These experimental results lead on to the possibility that the superflow is involved with actual fluid moving along imperfections in the crystal rather than a property of the perfect crystal.