problem作为问题时可数吗

　　We need to take a more global approach to the problem.

　　我们需要更全面地看这个问题。

　　This is going to be a huge problem for us.

　　这将是我们的一大难题。

　　There must be a way around the problem.

　　肯定有解决这个问题的办法。

　　Let's attack one problem at a time.

　　咱们一次全力处理一个问题。

　　One major problem did present itself, though.

　　不过，确实出现了一个重大问题。