But suppose you take some dirt and dig through it and then put it into these spectrometers, because there's bacteria all over the place; or you take water anywhere on Earth, because it's teaming with life, and you make the same analysis; the spectrum looks completely different.
但是如果 采集一些土壤 放到光谱仪里 因为细菌的存在 或者采集地球上任何一处的水 因为水里富含生命 然后你做同样的分析 光谱结果完全不一样