氦和氩都是单原子气体。

Helium gas was the thermometric fluid.

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氩是单原子气体。

Argon is a monatomic gas.

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这些都是单电子原子，它们都是气体，都是单原子。

These are all one electron atoms, and they are gas, a single atom.

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这些都是单电子原子，它们都是气体，都是单原子。

These are all one electron atoms, and they are gas, a single atom.

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