很难说

• It is hard to say . usually , it takes twenty-five minutes .
  很难说，通常需要二十五分钟。
• How he had arrived at this conclusion it is hard to say .
  很难说他究竟怎么得出这个结论的。
• It is hard to say who it was .
  很难说是谁。
• It's difficult, however, to know who would be most effective .
  但是，很难说谁会取得最好的效果。
• Your testimony on this matter is hardly unimpeachable .
  在这个问题上你的辩驳很难说是无懈可击的。
• It was touch-and-go whether we would get to the airport in time .
  我们是否能按时到机场还很难说。
• One does not know how many such balls there will be in the future .
  很难说以后还能举行多少这样的舞会了。
• The future is so uncertain that one man's guess is as good as another's .
  未来的事情很难说，大家都心中无数。
• The immediate future is clear , but it is hard to tell what lies beyond .
  近期内的情况很清楚，但很难说以后如何。
• It proved difficult to convince stans of the wisdom of this course .
  我们发现很难说服斯坦斯理解这个方针的明智性。