usefully ['ju:sfəlɪ]

例句:

• House heating systems are usefully designed using these equations.
  来自SA
• Tax breaks to wealthier pensioners could also usefully disappear.
  来自THETIMES
• Your time could be usefully employed in attending to professional matters.
  你可以有效地利用时间处理一些专业问题。
  
• We need to find ways of dealing creatively and usefully with our feelings.
  我们需要找到一些既有创意又实用的方法来调整我们的情绪。
  
• In some cases the slag can be disposed of usefully.
  有时炉渣能有用处.
  
• My close ties with America...could be usefully exploited.
  来自H. Macmillan