A drop-down menu that controls the chart data series type.
控制图表数据级数类型的下拉菜单。
For example, the extension can be as simple as a new entry in a pop-up menu, or as comprehensive as a completely new type of project, or a series of editors and views.
例如,扩展可以简单到只是弹出菜单中的一个新项,也可以像一个完全的新型项目、或是一系列的编辑器和视图这样包括众多。
"Many people," Kornell noted, "have had the experience of listening to a computer instructor open a menu and go through a series of steps."
科内尔强调称:“许多人都曾有过这样的经历,比如听计算机老师讲解如何打开菜单并完成一系列步骤。”
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