椎管狭窄症状是机械和血管性因素的共同结果。
Stenotic symptoms are the result of mechanical and vascular factors.
吸烟是一个得到确定的中风的风险因素，并且可能通过相似的机制构成血管性痴呆的风险，作者们指出。
Smoking is a well-established risk factor for stroke, and may contribute to the risk of vascular dementia through similar mechanisms, the authors note.
高血压是血管性痴呆的危险因素，原因是一系列的小卒中引起脑功能损伤。
High blood pressure is a known risk factor for vascular dementia, where brain function is damaged by a series of small strokes.
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