molecular laser spectroscopy

例句：

1. 1. The molecules in the air are composed of oxygen and nitrogen.
   空气中的分子由氧和氮组成。
2. 2.The structure of DNA is made up of molecules of deoxyribose.
   DNA的结构由脱氧核糖分子组成。
3. 3.The study of molecular biology is a field of research that focuses on the structure and function of biological molecules.
   分子生物学研究是专注于生物分子结构和功能的研究领域。