达尔文的进化论从根本上改变了我们对生物学的理解。

Darwin's ___theory of evolution fundamentally changed our understanding of biology.

她提出一个理论，认为这座古代遗迹是用来进行天文观测的。

She has a ___theory that the ancient monument was used for astronomical observations.

爱因斯坦的相对论是现代物理学的基石。

Einstein's ___theory of relativity is a cornerstone of modern physics.