This means that those menu items are available that are relevant to the work currently being carried out. If the cursor is located in a text, then all of those menu items are available that are needed to edit the text. If you have selected graphics in a document, then you will see all of the menu items that can be used to edit graphics.
菜单与上下文有关，这意味着只有与当前执行的操作有关的菜单项才可用。如果光标位于文字中，则编辑文字时所需的所有菜单项都可用。如果在文档中选定了图形，则会看到所有可以用于编辑图形的菜单项。