The stability of biological system was discussed based on classic automatic control system and a mathematic model of blood pressure control was presented.
按照经典的控制理论，讨论了生物系统的稳定性，提出了血压控制的数学模型。
Drug stability in a biological fluid is a function of the storage conditions, the chemical properties of the drug, the matrix, and the container system.
生物流体(尿囊液？)药物稳定性是贮存条件，药物化学特性，基质和容器系统的函数。
Analysing the reason, the packing retains a large amount of active mud, makes the biological total amount of the system increasing and improves the stability of the system.
分析原因，是因为反应器中的填料截留了大量的活性污泥，使系统的生物总量增大，提高了系统运行的稳定性。
Analysing the reason, the packing retains a large amount of active mud, makes the biological total amount of the system increasing and improves the stability of the system.
分析原因，是因为反应器中的填料截留了大量的活性污泥，使系统的生物总量增大，提高了系统运行的稳定性。
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