unsolved

形容词 unsolved:

1. not solved
   同义词：unresolved

1. Put these letter in the unsolved cases file.
   将这些信件放入未破案件卷宗内。
2. The problem remains unsolved.
   这个问题仍未解决。
3. The murder remained an unsolved mystery.
   那个谋杀案仍然是个未解决的秘密。