The second category are material activities, including "Business Modeling," "Requirements," "Analysis and Design," "Implementation," "Test," and "Deployment."
第二类是材料活动，包括“商业模型”，“需求”，“分析和设计”，“实现”，“测试”，和“部署”。
2
When modeling any material, the spring can be used to represent an ideal elastic material and the dashpot an ideal viscoelastic material.
当模型的任何材料，弹簧可以用来代表一种理想的弹性材料和粘弹性阻尼器的理想材料。
3
The current FE modeling strategy is insufficient, however, and significant modifications must be made to better mimic whole bone elastic and inelastic material behavior.