1. vacuum and inert atmosphere rolling 
   真空和保护气体中轧制
2. a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere. 
   无色无味的惰性气体，六种惰性气体之一，构成地球大气约百分之一的部分。
3. a colorless odorless inert gaseous element occurring in the earth's atmosphere in trace amounts. 
   在地球的大气层中少量存在的无色无味的惰性气体。
4. a common nonmetallic element that is normally a colorless odorless tasteless inert diatomic gas; constitutes 78 percent of the atmosphere by volume; a constituent of all living tissues. 
   一种常见的非金属元素，通常为无色无嗅无味的惰性二原子气体，体积占大气的%，活细胞的组成成分。
5. At the same time, we know that the meteorites could not have delivered all of the water, because then the earth's atmosphere would contain nearly 10times as much xenon (an inert gas) as it actually does. 
   同时，我们也知道富水陨星不可能提供地球上的全部水源，因为如果那样的话，地球的大气层中的氙(一种惰性气体)含量将会是它实际含量的近10倍。

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