The VPA is a two-way communication zone between the operating system and the hypervisor on information required about the virtual processor.

VPA 是操作系统和 Hypervisor 之间的一个双向通信区，用于传递所需的、有关虚拟处理器的信息。

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And, the system can realize functions of automatic irrigation, drainage warning, real time clock, historical data inquiry, data up-transmission and two-way communication.

系统能够实现自动化灌溉，具有排水警示、实时时钟、历史数据查询、数据上传及双向通信等功能。

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LLCD is NASA's first system for two-way communication using a laser instead of radio waves.

LLCD是NASA的第一个使用激光而不是无线电波的双向通信系统。

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It leverages Apple's iOS operating system and its corresponding SDK (Software Development Kit) to provide a two-way communication interface between apps and connected accessories.

ENGADGET: Oscium's iMSO-104 turns iPad, iPhone into mixed signal oscilloscopes