molecular and equivalent

例句：

1. 1.The molecular structure of water is a key factor in understanding its properties.
   水的分子结构是理解其性质的关键因素。
2. 2. The equivalence of two numbers is determined by their absolute values.
   两个数的相等性由它们的绝对值决定。
3. 3. Molecules are the basic units of matter that make up everything around us.
   分子是构成我们周围一切的基本单位。