light absorption lines的意思|示意

As light from a quasar travels through space, it passes through clouds of gas that imprint absorption lines onto its spectrum.

当光从一个类星体划过太空，便会穿过将吸收线特征印在光谱上的气体云。

The three sets of observations that purported to see methane on Mars all relied on the absorption lines which the gas imposes on light at specific wavelengths.

三组观测声称火星上有甲烷依赖于甲烷气体所影响的吸收(谱)线处在一个非常特别的波段上。