这个文档是超级有用的噻。列出部分的目录Overview1.1Scope1.2Purpose2.NormativeReferences3.Definitions,Acronyms,andAbbreviations3.1Definitions3.2AcronymsandAbbreviations4.ClassesandUtilities5.BaseClasses5.1uvm_void5.2uvm_object5.3uvm_transaction5.4uvm_root5.5uvm_por