( ( At ( high temperatures ) ) ( , ( ( the ( solid dye ) ) ( ( ( converts ( into ( a gas ) ) ) ( without ( ever ( becoming ( a liquid ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN At) (NP (JJ high) (NNS temperatures))) (, ,) (NP (DT the) (JJ solid) (NN dye)) (VP (VBZ converts) (PP (IN into) (NP (DT a) (NN gas))) (PP (IN without) (S (ADVP (RB ever)) (VP (VBG becoming) (NP (DT a) (NN liquid)))))) (. .)))
At high temperatures, the solid dye converts into a gas without ever becoming a liquid.
(ROOT (S (NP (NNS Gases) (CC and) (NNS liquids)) (VP (VBP become) (NP (NNS solids)) (PP (IN at) (NP (JJ low) (NNS temperatures)))) (. .)))
Gases and liquids become solids at low temperatures.