Selenium works synergistically with vitamin E to boost antioxidant power and prevent or slow signs of aging and hardening of tissues through oxidation.
硒和维生素E相互协作，提高抗氧化能力防止和减缓老年化，通过氧化作用防止和减缓身体组织老化变硬。
2
The hardening case depth and hardness curve can be changed by adjusting heating time, heating power and cooling speed during induction hardening.
在感应淬火中，通过改变加热时间、加热功率和冷却速度可以改变淬硬层深度和硬度梯度。
3
The bifurcation problem of dynamical formation and growth of cavity in a sphere composed of a powerhardening material and a hyper-elastic material is discussed in this paper.