VOA慢速英语:High-Tech Material Cools Buildings, Sends Heat Into Space

air conditioning – n. a system used for cooling and drying the air in a building, room, etc.

infrared – adj. producing or using rays of light that cannot be seen and that are longer than rays that produce red light

radiation – n. energy that comes from a source in the form of waves or rays you cannot see

solar panel – n. a large, flat piece of equipment that uses the sun's light or heat to create electricity