( This ( ( is ( ( a matter ) ( ( on which ) ( I ( ( dare not ) ( ( pass judgment ) lightly ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT This)) (VP (VBZ is) (NP (NP (DT a) (NN matter)) (SBAR (WHPP (IN on) (WHNP (WDT which))) (S (NP (PRP I)) (VP (MD dare) (RB not) (VP (VB pass) (NP (NN judgment)) (ADVP (RB lightly)))))))) (. .)))
This is a matter on which I dare not pass judgment lightly.
(ROOT (S (NP (JJ Translucent) (NN matter)) (VP (VBZ transmits) (NP (ADJP (JJ light) (CC but) (JJ scatters)) (DT the) (NN light)) (SBAR (IN as) (S (NP (PRP it)) (VP (VBZ passes) (PRT (RP through)))))) (. .)))
Translucent matter transmits light but scatters the light as it passes through.