A superconductor is a rare material that conducts electricity without the energy-wasting resistance typical of copper and other common electrical materials.
(A superconductor; is; a rare material that conducts electricity without the energy-wasting resistance typical of copper and other common electrical materials) (a rare material; conducts; electricity)
A superconductor a rare material
is conducts
a rare material that conducts electricity without the energy-wasting resistance typical of copper and other common electrical materials
electricity