Blood pressure: Force originating when the heart's pumping pushes the Blood against the walls of the Blood vessels. Their stretching and contraction help maintain Blood flow.
血压：血液作用于血管壁的压力，产生于心脏的泵推作用。血管的舒张和收缩对维持血液的流动有所帮助。
Contraction flow behavior contributes significantly to the orientation and structure of molecular in micro injection molding.
聚合物流体的收缩流动行为是微注射成型工艺过程中影响分子取向与结构的重要因素。
Expansion and contraction of blood vessels of normal blood flow is essential.
血管的扩张和收缩对血液的正常的流动是必需的。
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