The latest scientific discoveries cast doubt on earlier theories.
科学上的最新发现使我们对以前的学说产生怀疑.
There is a distant connection between the two theories.
这两种学说之间没有什麽关联.
This discovery makes (a) nonsense of (ie clearly disproves) previous theories.
这一发现证明了过去的理论不能成立.
