Sentence:  A randomization of `` ups '' and `` downs '' is more likely than ordered `` ups '' and `` downs '' in position ( 3 ) since the hydrogen atoms are well separated and so the position of one could hardly <WSD>affect</WSD> the position of another , and also since ordered `` up '' and `` down '' implies a larger unit cell , for which no evidence exists . 
Meaning of the word marked with <WSD> tags:  act physically on; have an effect upon