While calcining at much higher temperature would lead to the aggregation of gold particles and the decreaseofactivity.
焙烧温度过高，可能造成金微粒的团聚烧结，使其活性下降；
2
The rate of combustion reaction and liquid production are increased with the increase of frequency factor of combustion, decreaseofactivity energy, and increase of air injection rate.
增加燃烧反应的频率因子、降低活化能、增大注气速度，会加快燃烧反应，增加产液量；
3
A decrease in physical activity due to the increasingly sedentary nature of many forms of work, changing modes of transportation, and increasing urbanization.