耐火材料的化学分析.硅材料.硅的测定.(氢氟快速挥发法)
氧化性气氛可促进含碳球团中硫的挥发。
1·The soils are inherently low in available phosphorus, and nitrogen is quickly lost through leaching and volatilisation.
本来就低的土壤中速效磷,氮迅速通过淋溶和挥发损失。