1. Objective: To monitor the blood drug concentration to adjust the dosage for individual administration. 目的：了解老年患者体内茶碱血药浓度，以便调整用药方案。
2. Adopt stainless steel pump in common use, or ceramic pump in special use to fill high precision, large range of adjusting dosage. 一般场合采用不锈钢柱塞泵，液体腐蚀性强时，采用容积式陶瓷泵罐装、精度高、调节剂量范围大。
3. Result indicates that Sodium dehydroacetate and Calcium propionate can effectively stave mildew of bread, the more dosage is, the more effect is. 结果表明：脱氢醋酸钠和丙酸钙均能有效地延迟面包的霉变时间，且随用量的增大，效果越好；
英英解释
n.
1. the quantity of an active agent (substance or radiation) taken in or absorbed at any one time
