back scatter

例句：

1. 1. The physicist used a backscattering technique to study the material's structure.
   物理学家使用一种背散射技术来研究材料的结构。
2. 2.Backscattering is a method of measuring the properties of materials by analyzing the scattered radiation.
   背散射是一种通过分析散射辐射来测量材料属性的方法。
3. 3. In this experiment, we observed the backscattering of light from the particles in the sample.
   在这个实验中，我们观察到了样品中粒子的背散射光。