例如，我们有 order 业务项目，它有诸如 orderItems 和 valid 之类的属性。

For example, we can have an order business item with its attributes such as orderItems and valid.

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另外，在加载界面或更新内容时，我们还需要关心如何为用户提供支持(例如，使用诸如进度条之类的可视化反馈技术)。

Also, take care to support the user (for example, with visual feedback such as progress bars) while the interface loads or content is updated.

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诸如MS - DOS之类的操作系统可以加载其他设备驱动程序，例如CD - ROM驱动器，但是需要所有硬件驱动程序在启动时就已经加载上来了。

An operating system such as MS-DOS can load additional device drivers, such as CD-ROM drivers, but needs all of the hardware drivers already loaded at startup.

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