甲烷

Under the experimental conditions, conversions of methane and carbon dioxide were from 30% to 65% and from 10% to 50%, respectively.

在实验条件下，甲烷和二氧化碳的转化率分别在30％～65％和10％～50％之间。

Methane is the primary component of natural gas.

甲烷是天然气的主要组成成分。

This is why it is necessary to focus on short-lived gases,namely methane.

这也是为什麼，我们必须先减少留存期短的温室气体，也就是甲烷。

The conversion of methane is more than 92%, and the selectivity for CO and H〓 is 90% at 700℃.

在常压、700℃的条件下，甲烷的转化率大于92%，H〓和CO的选择性均在90%以上。

I think there's methane gas or something in the building.

我想这个建筑可能有甲烷或者其他什么东西吧。

That accounted for about 8 percent of the total industrial methane emissions that year.

占8 %左右的工业总产值中的甲烷排放量。

And over the past 250 years, the levels of greenhouse gases, like carbon dioxide and methane

在过去的250年里，温室气体的层次，例如二氧化碳以及甲烷。。。。。。

In the new system, bacteria produce methane gas from the juice.

在新的制度，细菌产生的汁液的甲烷气体。

Methane is a principal component of natural gas.

天然气的主要成分是甲烷。

Methane and carbon dioxide are very rich resource and energy and the major greenhouses in the world.

甲烷、二氧化碳是十分丰富的资源和能量，同时也是主要的温室气体。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。