Original: It could thus be that the resonance which holds Thule in an extremely low-eccentricity orbit serves to eject other smaller bodies whose distance from the Sun is only slightly different from that of Thule itself.
Simplified: It could thus be that the resonance which holds Thule in a very low-eccentricity orbit serves to eject other smaller bodies whose distance from the Sun is only a bit different from that of Thule itself.