theories

['θiəriz]

n. 理论
名词theory的单数形式

例句与用法：

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。

Mary is full of fascinating theories about men and women.

玛丽对男人和女人充满了迷人的想法。

His theories were discredited by scientists.

他的理论科学家很怀疑。

It is one thing to have theories, and another thing to put them into practice.

理论是一回事，能否将它们付诸实施，则又是另一回事。

It is the translation of theories into practice.

这是理论到实践的转变。