[求助]接口概念求解

<P><FONT color=#ff0000>大家好，我刚学engine开发不久</FONT></P>
<P><FONT color=#ff0000>IWorkspaceFactory interface:</FONT>Provides access to members that create and open workspaces and supply workspace factory information. </P>
<P><FONT color=#ff0000>IWorkspace:</FONT>Provides access to members that have information about the workspace. </P>
<P><FONT color=#ff0000>IFeatureWorkspace:</FONT>Provides access to members that create and open various types of datasets and other workspace level objects. </P>
<P><FONT color=#ff0000>IFeatureClass:</FONT>Provides access to members that control the behavior and properties of a feature class.</P>
<P><FONT color=#ff0000>IFeatureCursor:</FONT>Provides access to members that hand out enumerated features, field collections and allows for the updating, deleting and inserting of features. </P>
<P><FONT color=#ff0000>IFields:</FONT>Provides access to members that return information about the fields. </P>
<P>这些东西，看起来大概能懂，但要领略它的精准的含义，还是难啊，有谁明白的给吱一声啊谢谢，用中文。</P>
<P>还有在什么情况下必须用到这些东西？</P>

<P>查询和编辑用得比较多，：）</P>
<P>这个描述还比较详细，偶就不翻译了</P>