The infrared spectroscopy matched paint fragments in the head wound to the proximal line of pipe wrenches.

红外光谱显示死者头部伤口的油漆残片与管钳的近似线吻合。

And they also subjected it to a technique called reflection-mode Fourier-transform infrared spectroscopy.

他们还对其进行了一种称为反射模式傅立叶变换红外光谱的技术。

From infrared spectroscopy of minerals deposited on its surface they determined that, yes, it had been buried at some point.

根据沉积在其表面的矿物的红外光谱，他们确定，是的，它曾在某个地方被掩埋过。