The methane concentration nearly doubled, for example, between the peak of the penultimate glacial period and the following interglacialperiod.
例如，在倒数第二个冰期的高峰和接下来的间冰期之间，甲烷浓度几乎增加了一倍。
2
Its peak, that is, there is the most carbon dioxide and methane gas, greenhouse gases in the atmosphere just after the beginning of the interglacialperiod.
它的峰值，就是在间冰期刚开始，大气中有最多的二氧化碳和甲烷气体，温室气体。
3
Now, the typical pattern for an interglacialperiod—and we've studied several—is that the concentration of carbon dioxide and methane gas actually reaches its peak.