Simple technologies, like wall-mounted devices that display how much power your household is using, and what kind of results you'll get if you turn off a few lights -- these can actually have a direct positive impact on your energy footprint.
简单科技，比如壁挂式设计 可以显示出你们一家人正在使用多少能源 以及如果你关掉一些灯，结果又会如何 这些真的会带来一些正面影响 在你的能源足迹上