defect concentration

例句：

1. 1. The defect concentration in this material is very low, which makes it suitable for use inelectronics.
   这种材料的缺陷浓度非常低，因此适用于电子领域。
2. 2. The defect concentration in the crystal was measured using a scanning electron microscope.
   使用扫描电子显微镜测量了晶体的缺陷浓度。
3. 3. The defect concentration in the sample was determined by analyzing the X-ray diffraction patterns.
   通过分析X射线衍射图谱来确定样品中的缺陷浓度。