在构造菜单时，可能出现与清单 1 类似的代码。

When constructing a menu, code similar to Listing 1 might appear.

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在 Motorcycle 类的原始版本中，使用 Source 菜单生成几个构造函数，如清单 6 中所示。

With the original version of the Motorcycle class, use the Source menu to generate a few constructors, like those shown in Listing 6.

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随着这些新构造的出现，工具栏真正使自己成为一个主要的控制工具。不同于下拉菜单，而且在许多情况下优于下拉菜单。

With the advent of these new constructions, the toolbar truly came into its own as a primary control device, separate from-and in many cases superior to-menus.

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