Researchers were looking for the spectral signature of carbon dioxide when they noticed something baffling: an unexpected wavelength of unknown origin.

在研究人员正在寻找二氧化碳的光谱特征时，他们发现了一个令人疑惑的东西：一道来历不明，令人意外的波长。

But because the satellite is a mission that will be up there for a few years at least, we will be able to track the temporal variations of those spectral signatures.

但由于卫星至少要在天上待几年，因此我们将能够追踪这些光谱特征时间变化。