low-energy electron diffraction

例句：

1. 1.The technique of low-energy electron diffraction is used to study the structure of materials at the nanoscale.
   低能电子衍射技术被用来研究材料在纳米尺度的结构。
2. 2. In this experiment, we used low-energy electron diffraction to observe the crystal structure of the sample.
   在这个实验中，我们使用低能电子衍射来观察样品的晶体结构。
3. 3.Low-energy electron diffraction has proven to be a powerful tool for characterizing the microstructure of materials.
   低能电子衍射已被证明是表征材料微观结构的一种有力工具。