dilatory       
adjective  formal uk/ˈdɪl.ə.tər.i/ us/ˈdɪl.ə.tɔːr.i/
 缓慢的,拖延的,迟缓的
slow and likely to cause delay
  dilatory behaviour/tactics 拖延行为/策略 
 British institutions have been dilatory in cutting credit card charges. 英国银行机构在降低信用卡收费方面一直拖拖拉拉。