The statistical expression of the circulation velocity of money is presented by introducing the concept of money holding time, it follows that the circulation velocity of money is inversely proportional to the average money holding time. 从持币时间概念出发推出货币流通速度的统计表达式,得到货币流通速度与平均持币时间成反比。
The research indicated that ventilate property of the investment is suitable, average linear dilatability increased with baking temperature raising, holding time prolonging and powder-to-liquid weight ratio descending. 研究结果表明,本包埋料的透气性好,随着焙烧温度的提高、保温时间的延长、粉液比的降低,包埋料的平均线膨胀率也随之提高。