Air whether in the gaseous or liquid state is a fluid.

空气, 无论气的或的, 都一种流体。

Water vapor is water in the form of a gas.

水蒸气气的水。

The results indicated that the trace elements molybdenum and zirconium increased considerably the gas yields of the lignitic organic matter while selenium did not.

析结果表明,除硒元外,随着钼元和锆元的加入,褐煤有机质气产物的生成量显著提高。