在近红外区由于弱吸收本体效应起主要作用，这三种光谱形状相似。

The shapes of the three spectra are similar in the near-<em>infrared</em> <em>region</em> owing to the bulk effect.

利用二级散射技术可在近紫外—可见区激发，在近红外区检测，能有效地降低了背景干扰。

The technique of RDLS can be excited at near ultraviolet-visible light and detected at near infrared area.