gross calorific value on moist ash-free basis

例句：

1. 1.The energy content of the fuel is an important factor in determining its gross calorific value.
   燃料的能量含量是决定其总热值的重要因素。
2. 2. The gross calorific value of the food was determined by measuring its weight and volume.
   通过测量食物的重量和体积来确定食物的总热值。
3. 3.The study found that the gross calorific value of the food was significantly lower than expected.
   研究发现，这种食物的总热值远低于预期。