沼气主要成分是甲烷。

The main component of marsh gas is methane.

甲烷是一种重要的温室气体。

Methane is an important greenhouse gas.

甲烷是一种无色无味的气体。

Methane is a colorless and odorless gas.

甲烷主要存在于天然气中。

Methane is primarily found in natural gas.

甲烷分子中所有的键都是单键。

All the bonds in a methane molecule are single bonds.

农业活动会释放大量的甲烷。

Agricultural activities release a large amount of methane.

公司分馏天然气以获得甲烷。

The company fractionated the natural gas to obtain methane.

科学家们正在研究如何减少甲烷排放。

Scientists are studying how to reduce methane emissions.

融化的永久冻土向大气中释放甲烷。

The melting permafrost releases methane into the atmosphere.

甲烷中的碳原子形成了四面体的排列。

The carbon atom in methane forms a tetrahedral arrangement.