( There ( ( is ( ( ( ( ( no ( electrical resistance ) ) ( in ( a superconductor ) ) ) , ) and ) ( therefore ( no ( energy loss ) ) ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBZ is) (NP (NP (NP (DT no) (JJ electrical) (NN resistance)) (PP (IN in) (NP (DT a) (NN superconductor)))) (, ,) (CC and) (NP (ADVP (RB therefore)) (DT no) (NN energy) (NN loss)))) (. .)))
There is no electrical resistance in a superconductor, and therefore no energy loss.
(ROOT (S (NP (PRP You)) (VP (VBP call) (S (NP (NNS materials)) (ADJP (JJ able) (S (VP (TO to) (VP (VB conduct) (NP (NN electricity)) (PP (IN with) (NP (ADJP (CD 100) (NN %)) (NN efficiency))) (, ,) (S (VP (VBG meaning) (SBAR (IN that) (S (NP (DT no) (NN energy)) (VP (VBZ is) (VP (VBN lost) (PP (IN during) (NP (NP (DT the) (JJ electrical) (NN transmission)) (, ,) (NP (NNS superconductors)))))))))))))))) (. .)))
You call materials able to conduct electricity with 100% efficiency, meaning that no energy is lost during the electrical transmission, superconductors.