( ( ( ( Chilling them ) ( to ( ( nearly ( absolute zero ) ) ( -LRB- ( ( -459 F ) -RRB- ) ) ) ) ) ( , ( ( ( the temperature ) ( ( at which ) ( ( all ( atomic motion ) ) ceases ) ) ) , ) ) ) ( ( stops ( this ( distracting vibration ) ) ) . ) )
(ROOT (S (NP (S (VP (VBG Chilling) (NP (PRP them)) (PP (TO to) (NP (NP (RB nearly) (JJ absolute) (NN zero)) (PRN (-LRB- -LRB-) (NP (CD -459) (NN F)) (-RRB- -RRB-)))))) (, ,) (NP (NP (DT the) (NN temperature)) (SBAR (WHPP (IN at) (WHNP (WDT which))) (S (NP (DT all) (JJ atomic) (NN motion)) (VP (VBZ ceases))))) (, ,)) (VP (VBZ stops) (NP (DT this) (JJ distracting) (NN vibration))) (. .)))
Chilling them to nearly absolute zero (-459 F), the temperature at which all atomic motion ceases, stops this distracting vibration.
(ROOT (S (NP (NP (DT The) (NN temperature)) (SBAR (WHPP (IN at) (WHNP (WDT which))) (S (NP (DT all) (JJ molecular) (NN motion)) (VP (VBZ has) (VP (VBN ceased)))))) (VP (VBZ is) (VP (VBN called) (NP (JJ absolute) (NN zero)))) (. .)))