long-term and short term造句

• Using biomechanics methods , through the study of the influence of different injection and maintain period on the expansion efficacy and shrinkage rate of skin , a rapid expansion method with relatively big expansion area is proposed ; biomechanics analysis in vivo is been made on the expanded skin ; comparing the biomechanics property in vitro of the rapid expansion and conventional expansion with different maintaining times , the parameters such as strength , stress - strain relationship , stress relaxation and creep which reflect the characteristic of the expanded skin have been obtained ; making the research of the expanded skin ' s biomechanics changes at different stage after grafting , the long - term and short term diversified regular has been obtained ; making experimental study and discussing the changes in the microcirculation and vessel structure of exceedingly expanded shin , the relationship between survival length of flap and the changes has been gotten
  本课题旨在用生物力学的方法通过动物实验来研究不同注水扩张期和维持扩张期对皮肤扩张量和皮肤回缩的影响，探讨有效获取较大的扩张皮肤面积的快速扩张方法；对扩张皮肤进行在体生物力学特性分析；比较了快速扩张和常规扩张在不同维持期的皮肤离体生物力学特性，得到离体生物力学各参数，如强度、应力?应变、应力松弛、蠕变等；为全面了解扩张皮肤在移植后的近期和远期的变化规律，做了扩张皮肤移植后不同阶段的生物力学变化的实验研究；探讨了不同扩张量时皮肤的微循环变化和血管结构变化与皮瓣存活的关系。