itimCOCA²⁸⁰¹³⁶⁺⁵ 基本例句 Interchurch Trade and Industry Mission 教会间贸易工业代表团 On a basis of ITIL, separate the ITIM to three levels. Give the excuse for separating and explain the relationship between the levels and then give an integrity model in the end. 在研究 ITIL理论的基础上，为 IT基础架构管理划分了三个层次，阐述层次划分的理由以及层次间的关系，最终形成完整的设计模型。 cnki