One must see the molecular doctrine at work in physical theory to get a proper notion of molecules, and this is not a matter of analogy, nor of description at all. 要想获得分子的恰当概念,人们必须去学习物理学理论中的分子理论。
The doctrine of analogy of Thomas plays an important role in his theory of natural law. 托马斯的类比学说在其自然法思想中扮演了重要的角色。