evelite

这种无色无味、通常不具燃烧性的物质，是已知的七种单原子气体之一，这些气体不会轻易同其他原子结合。它们的这种特性使其被用于多种生产制造程序之中。

This colorless, odorless, and usually nonflammable substance is one of seven known monoatomic gases, or those that do not easily combine with other atoms. They are thus well suited for a variety of manufacturing implementations.