unsuccessful [ˌʌnsəkˈsɛsfəl]

例句:

• Please note that unsuccessful applicants will not be contacted.
  来自SA
• Unfortunately attempts to crossbreed it with other potatoes have been unsuccessful.
  不幸的是，将它与其他土豆品种杂交的尝试均告失败。
  
• There were reports last month of unsuccessful negotiations between guerrillas and commanders.
  有报道称上月游击队和指挥官之间的谈判失败。
  
• He and his friend Boris were unsuccessful in getting a job.
  他和他朋友鲍里斯都没有找到工作。
  
• You are going to find that an unsuccessful route.
  来自THETIMES
• Unsuccessful Ticketcare applicants are entitled to a full refund.
  来自BBC