Complex sentence: The three actuation responses that can be achieved by artificial muscles--contraction, expansion, and rotation--can be combined together within one body to produce other types of motions (e.g. bending, by contracting one side of the material while expanding the other side).
Split into simpler sentences: The three actuation responses that can be achieved by artificial muscles are contraction, expansion, and rotation. These three components can be combined together within one body to produce other types of motions (e.g. bending: by contracting one side of the material while expanding the other side).