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

空气, 无论是气的或是液的, 都是一种流体。

Water vapor is water in the form of a gas.

水蒸气是气的水。

M-exists in three states: solid, liquid and gas.

物质以三种状存在: 固、液气。

Homogenous reaction between hydrogen sulfide and elemental lead vapor removes hydrogen sulfide efficiently as the hot coal gas left the carbonizer.

气硫化氢在开炼焦室，煤气降低温度，又生成硫化。

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

分析结果表明,除硒元素外,随着钼元素锆元素的加入,褐煤有机质气产物的生成量显著提高。