meaninglessly       
adverb uk/ˈmiː.nɪŋ.ləs.li/ us/ˈmiː.nɪŋ.ləs.li/
 无意义地
in a way that has no meaning or importance
  Has football ever been described so meaninglessly?  足球是否曾被描述得如此毫无意义? 
 Troops were being sacrificed seemingly meaninglessly. 
See: meaningless
 - More examples
 - She talked meaninglessly to him about whatever came into her head.
 - It's hard to accept that disease can afflict anyone, randomly and meaninglessly.
 - Stripped of their anonymity, reviewers gave meaninglessly bland assessments.