The letter offers similar product levels as Sun before the Oracle takeover: Basic, Silver, Platinum and Unlimited, it's in support services and software the offerings differ.
信中他们提供与前Sun相同的产品级别：基本版，银版，白金版和最终版，只是服务和软件有所不同。
2
Framework, as the basic platform of application system, should integrate these technologies to supportsoftware reuse and evolution.
而框架做为应用系统的基础平台，应当整合这些技术，支持软件的复用和演化。
3
At the same time, the method and basic theory of dynamics software ADAMS are introduced. The project studies the key technical problem of establishing hydraulic support virtual prototype model.