cerebral vascular resistance

例句：

1. 1. The patient's conditionworsened, and the doctor recommended ahigher dose of medication.
   患者的病情恶化，医生建议使用更高剂量的药物。
2. 2. The study foundthat exercise can improve cerebralvascular resistance.
   研究发现，运动可以改善脑血流阻力。
3. 3. The elderly often have reducedcerebral vascular resistance, whichcan lead to cognitive decline.
   老年人的脑血流阻力通常较低，这可能导致认知功能下降。