rank of coalification的用法和样例：
例句
- The plasma temperature differs from one kind to another, the higher the coalification degree is, the higher the plasma temperature will be.
在相同实验条件下，不同煤种的等离子体温度不同，煤化程度越高等离子体温度越高。 - The results show that the gasification reactivity of anthracite chars with steam has a good correlation with the coal rank, i.e. the higher the coal rank, the lower the reactivity.
结果表明，无烟煤焦与水蒸气气化反应的活性与无烟煤的煤化程度相对应，无烟煤煤化程度越高，水蒸气气化反应活性越小。
