outstanding problems

• n. 未解决的问题

例句

用作名词 (n.)

1. Each of them, at any stage of its development, has unsolved problems and undigested anomalies.
   它们中的每个在自己发展的任何阶段上,都有未解决的问题和未理解的反常。
2. The vastness of the oceans and the complexity of their problems still leave many puzzles unsolved.
   浩瀚的海洋及其问题的复杂性仍然留下许多未解决的难题。