uselessness ['ju:sləsnəs]

例句:

• The car had rusted almost to the point of uselessness.
  这车已经锈得几乎一点用都没有了。
  
• Unemployment leads to a sense of uselessness, to say nothing of financial problems.
  失业会让人觉得自己一无是处，更何况还会带来经济问题。
  
• What troubled him most was the uselessness of Fanny's effort.
  他想的最多的还是范妮在绘画上徒劳无益的努力.
  
• Like a cocoon, the community ensures that no individual experiences isolation or feelings of uselessness.
  来自SA