rank of coalification的用法和樣例：
例句
- The plasma temperature differs from one kind to another, the higher the coalification degree is, the higher the plasma temperature will be.
在相同實驗條件下，不同煤種的等離子體溫度不同，煤化程度越高等離子體溫度越高。 - 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.
結果表明，無煙煤焦與水蒸氣氣化反應的活性與無煙煤的煤化程度相對應，無煙煤煤化程度越高，水蒸氣氣化反應活性越小。
