I2C bus is a universal bus, which is simple, efficiency and widely used in various electronic products and audio video devices, as well as in embedded system development.

I2C总线是一种很通用的总线，具有简单、高效等特点，广泛应用在各种消费类电子产品及音视频设备上，在嵌入式系统的开发中也经常用到。

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Robert Stavins of Harvard University argues that the thorny notion of sustainable development can be reduced to two simple ideas: efficiency and intergenerational equity.

ECONOMIST: The invisible green hand

The answer is simple: capital efficiency .

FORBES: AVEO: An early stage VC's perspective

Hawker Beechcraft has kept the aircraft simple and reliable while adding advanced technology to improve efficiency, safety and functionality.

FORBES: The Most Successful Aircraft Design Gets Even Better