许多慢性疾病发展缓慢，但生活方式和行为变化却以惊人的速度席卷全球。
While many chronic conditions develop slowly, changes in lifestyles and behaviours are occurring with a stunning speed and sweep.
但在行为现代的、最近50000年的人类中，文化变化的速度繁忙得多了。
But among behaviorally modern humans, those of the last 50, 000 years, the tempo of cultural change has been far brisker.
将MR流体流动模型和MR阀有限元结果相结合，求得了不同MR流体行为指数和不同磁场作用下阻尼力随活塞速度的变化规律。
The finite element analysis of the magnetic field for the MR valve of the damper is done via ANSYS soflware, and the magnetic flux density of the MR valve is obtained.
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