Krypton in today's atmosphere is somewhat heavier than solar krypton, and the krypton embedded in meteorites known as carbonaceous chondrites is even heavier than that.
氪在今天的大气层中比太阳能的氪更重一些，这些氪比埋入了陨星，也就是通常熟知的碳质球粒状陨石中的氪还有重很多。
The methanation of different carbonaceous phases under atmosphere of hydrogen and its utility in the purification of multi walled carbon nanotubes (MWCNTs) were studied.
研究了碳纳米管中各种不同形态的碳相在氢气氛下的甲烷化行为及其在碳纳米管纯化中的应用。
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