This process works too slowly, though, to account for the sudden drops seen in the methanelevel.
氧化物晾在一边。因为这个过程发生的很缓慢,所以有发现在甲烷层中出现突然掉落的液滴。
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Carbon monoxide offers a lot more energy per molecule to hungry microbes than methane does-but Mars's carbon monoxide level is stable and much higher than the claimed methanelevel.
When other greenhouse gases such as methane are included, the total level in the atmosphere, known as the carbon dioxide equivalent, is closer to 440ppm.