大气中的二氧化碳和甲烷阻止热量向太空散发。

Carbon dioxide and methane in the atmosphere block the escape of heat into space.

youdao

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。

Its peak, that is, there is the most carbon dioxide and methane gas, greenhouse gases in the atmosphere just after the beginning of the interglacial period.

youdao

此外，河流筑坝等工程也增加了沉积物的产量，更不用说大气中二氧化碳和甲烷的增加。

Also, things like the damming of rivers has caused increased sediment production, not to mention the addition of more carbon dioxide and methane in the atmosphere.

youdao

So, using our simple valence bond theory, what we would expect is that we want to pair up any unpaired electrons in methane with unpaired electrons from hydrogen and form bonds.

利用简单的价电子成键理论，我们预计,要把所有甲烷中没有配对的电子,和氢原子中没有配对的电子配对来形成键。

麻省理工公开课 - 化学原理课程节选