usefulness [ˈjusfəlnɪs]

例句:

• The UN is an organisation which has long since outlived its usefulness.
  联合国是一个早已形同虚设的机构。
  
• There are doubts about the usefulness of these tests.
  这些试验是否有用，人们有所保留。
  
• The report is of potential usefulness to the government.
  这个报告可能对政府有用.
  
• That in and of itself does not imply usefulness.
  来自SA
• Opinions on the usefulness of home banking varied widely.
  来自Which?
• So both their use and their usefulness were extremely limited.
  来自WSJ