unable

• The police were unable to clear up the mystery .
  警察解释不了这个难解的迷。
• She was unable to get to grips with her assailant .
  她无力与袭击她的人扭打。
• I came down with flu and was unable to go to work .
  我得了流感，不能去上班。
• We are unable to subsist without air and water .
  没有空气和水我们就活不下去。
• Mr. barker was unable to accept this statement .
  巴克先生却不能接受这个鉴定。
• He had been unable to reveal what he was after .
  他不能泄露他要调查的是什么。
• We are unable to subsist without air and water ..
  没有空气和水我们就活不下去。
• She was unable to be at his bedside when he died .
  他死时，她未能守在他的床边。
• She was unable to keep back her tears .
  她无法忍住泪水。
• The police cordon was unable to hold back the crowd .
  警方的警戒线阻挡不住人群。