P Creep and shrinkage of the concrete depend on the ambient humidity, the dimensions of the element and the composition of the concrete.

混凝土的蠕变和缩水取决于环境湿度，结构尺寸以及混凝土成分。

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Sensors constantly monitor temperature and humidity, as well as ambient light and activity near the device or farther away in the house.

恒温器上的传感器会不停监测温度、湿度、环境光以及设备周边和房间里远离设备的其它动静。

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Other issues to consider include indoor or outdoor installation locations, heat, humidity, ambient light, security and the potential for vandalism.

其他要考虑的问题是，室内或户外安装位置、热度、湿度、背景光、安全性和潜在破坏性。

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That's all thanks to a collection of six sensors, which keep tabs on metrics like temperature, ambient light, humidity and motion -- whether it's fingers about to touch the display or people passing in and out of the room.

ENGADGET: iPod fathers unveil their next project, the Nest Learning Thermostat (hands-on)