spinelessly       
adverb uk/ˈspaɪn.ləs.li/ us/ˈspaɪn.ləs.li/
 没有勇气地;无胆量地,怯懦地
in a way that shows a lack of determination and an unwillingness to take any risks
  He spinelessly agrees to her suggestion. 他毫无骨气地同意了她的建议。 
 She believes the Government spinelessly ducked the issue of using a zero emissions fuel.  她认为政府毫无骨气地回避了使用零排放燃料的问题。 
 See: spineless
 - More examples
 - You don't have to sit back spinelessly and let things happen.
 - Politicians yield spinelessly to the short-term interests of fishermen.
 - The veteran broadcaster laid into MPs for spinelessly "doing what they're told".