很难说

• It is difficult to state when the first metal complex was discovered .
  很难说出是什么时候第一次发现金属配合物的。
• It is difficult to speak about a definite direction of the decomposition reaction .
  很难说它的分解反应有一定的方向。
• You will find it difficult to explain away your use of such offensive language .
  你使用这样无礼的语言是很难说得过去的。
• It is hard to know exactly what to do -- we will just have to take a shot in the dark .
  很难说怎么办才对我们只好瞎碰。
• "one can never tell, dear bertha," replied miss glover, gloomily .
  “一个人很难说呢，亲爱的伯莎。”格洛弗小姐抑郁地答道。
• Amid the torn flesh, blood, and dirty, tousled hair, it was difficult to be sure .
  现在很难说，因为她皮开肉绽，血肉模糊，头发又脏又乱。
• Success would be the avoidance of catastrophe, hardly an achievement that invites acclaim .
  避免灾难就是胜利，这很难说是什么值得喝采的成就。
• It is hard to say , but i am sure one of the purposes is to construct a good philosophy for oneself .
  很难说，但我确定大学生活的目标之一是要为自己建立一个好的人生观。
• It had hardly been a propitious beginning, but he had chosen his course, and would show no swerve .
  这种情形很难说是一个吉利的开端，但是他已经选定了他的道路了，他不想三心二意。
• Knowing supply without knowing demand accomplishes little, like one blade of a scissors or one hand clapping .
  只了解供给而不了解需求，就像半把剪刀或孤掌难鸣一样，很难说明全貌。