We've added an accelerator key (hotkey), a tool tip, and an image (the tool tip won't show up on menu items, but it will on toolbar items, which we'll see later).

我们添加了一个加速键(热键)、一条工具提示和一个图像(工具提示不会在菜单项上显示，但会在工具栏项上显示，稍后将看到这一点)。

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Gets or sets the accelerator key for the specified element.

获取或设置指定元素的快捷键。

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