Stimulation of the autonomic nervous system can occur owing to hypoxia or hypercarbia from depressed ventilation. 自主神经系统兴奋作用的发生是由于通气受阻而导致的低氧血症和高碳酸血症引起的.
The design theory of driver circuit of large power circulator is discussed.本文论述了大功率环行器驱动电路的设计理论.Massage the aged regularly for better blood circulator.须帮老人轻巧地按摩身体,使老人血液循环畅通....