infrared absorption spectrography

例句：

1. 1. The infrared absorption spectrography of the sample was used to determine its composition.
   通过样品的红外吸收光谱分析，确定了其成分。
2. 2.This technique is particularly useful for analyzing materials with complex structures.
   这种方法特别适用于分析具有复杂结构的材料。
3. 3.Infrared absorption spectrography has proven to be an effective tool for detecting hidden defects in metals.
   红外吸收光谱学已被证明是一种有效的工具，用于检测金属中的隐藏缺陷。