The colours of the spectra can be seen in a rainbow.

彩虹中能看到光谱的颜色

The spectra show that the stars must have swallowed such planets during their expansive, red-giant stage.

光谱显示，这些恒星在膨胀的红巨星阶段肯定曾经吞没过这些行星。

The IR spectra of hydrogel, alcogel and aerogel of BaFe12O19 were studied.

对钡铁氧体的水凝胶、醇凝胶以及气凝胶的红外光谱进行了研究。

NMR spectra are often calibrated against the known solvent residual proton peak instead of added tetramethylsilane.

核磁共振谱通常是根据已知的溶剂残留质子峰进行校正，而不是添加四甲基硅烷。

Infrared spectra are exceedingly complex.

红外光谱是非常复杂的。

He measured the line spectra of atomic hydrogen.

测量了氢原子的线光谱。