molecular beam Stark effect

例句：

1. 1.The molecular beam is used to analyze the structure of molecules in a sample.
   分子束用于分析样品中分子的结构。
2. 2. In this experiment, we will use a molecular beam to study the reaction between two gases.
   在这个实验中，我们将使用分子束来研究两种气体之间的反应。
3. 3. The molecular beam was used to deposit metal onto the surface of the substrate.
   分子束被用来将金属沉积到衬底的表面。