Preparation and capacitance properties of nanostructured manganese dioxides were mainly researched in this paper.

本文主要研究了纳米二氧化锰材料的制备和电容性能。

The catalytic combustion of methane and the methane reforming with carbon dioxides are two effective ways of make use of the methane.

甲烷催化燃烧和二氧化碳重整甲烷制合成气是利用甲烷的两条有效途径。由于甲烷的化学稳定性，两个反应都需要高温条件才能进行。

Many scientists blame the increase in global temperatures on an increased concentration of carbon dioxides in the atmosphere, which surpassed 400 parts per million in May at the South pole.

很多科学家认为全球温度升是由于大气中二氧化碳浓度上升，今年五月份南极的二氧化碳浓度已超过百万分之四百。