管壁
减少血管壁的过分扩张和损害的风险。
Reducing your risk of your vascular walls becoming overstretched and injured.
相互撞击，或者撞击管壁。
事实上相当简单——血压是测量血液对血管壁产生的压力。
It's pretty simple — blood pressure is the measurement of the force of the blood against the walls of your blood vessels.
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