USB device driver is a reliable guarantee for USB device function.

USB驱动程序是实现USB设备功能的可靠保证。

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From bottom to top, the system is plotted out bus driver layer, device function driver layer, communication layer and user-interface. Each layer provides service to the layer above by interface style.

由下往上将整个驱动软件系统分为总线驱动层、设备功能驱动层、通信层和用户界面等层次，每一层都以接口的形式为上层提供服务。

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Language of this source is a device, and in relation to other devices it's called a "function."

语言是一种工具，和其他工具一样有功能“

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As time goes on, we've developed ever more complex machines to study people and we've talked about some of these already: EKG machines, so an example of an electrical device that can be used to monitor a very elaborate function deep inside your body, the beating of your heart and the rhythm of your heart.

如今,我们已经有功能更加复杂的设备,来研究人类,比如之前说到的心电图,我们使用电子装置,对身体内部机能进行精确地监控,具体到心电图就是心跳和心率

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When one array fails, a new one opens up, allowing the device to function for a full year.

FORBES: Magazine Article

These new mobile and live-streaming applications offer numerous benefits, such as using the VIXIA HF R42 or VIXIA HF R40 camcorder to record activities remotely, or setting the device to function as a baby monitor or security camera.

ENGADGET: Canon's latest VIXIA camcorders stream and share with your mobile device

It is in the process of shutting down its inkjet printer operations in order to concentrate on the faster growing laser printer and multi-function device markets.

FORBES: Did You See "Office Space"? The Printer Scene? Read On