far infrared absorption spectrum

例句：

1. 1.The far infrared absorption spectrum of the sample is very complex.
   样品的远红外吸收光谱非常复杂。
2. 2. The far infrared absorption spectrum can be used to study the thermal properties of materials.
   远红外吸收光谱可以用来研究材料的温度特性。
3. 3.The far infrared absorption spectrum was used to identify the chemical composition of the sample.
   远红外吸收光谱被用来鉴定样品的化学成分。