unanswered [ʌnˈɑ:nsərd]

例句:

• There were some holes in that theory, some unanswered questions.
  那个理论中有一些漏洞，一些问题没有解答。
  
• Calls to the Libyan Embassy in Bern went unanswered.
  来自WSJ
• Readers should send a copy of unanswered letters to their MP.
  读者应该把那些未得到回复的信件复印一份寄给代表他们的议员。
  
• He had always had difficulty leaving questions unanswered.
  如果有问题空着没有作答，他总会觉得不自在。
  
• I think that he left so many questions unanswered.
  来自VOA
• It raises numerous questions, and leaves them unanswered.
  来自BBC