本题你将听到一篇短文。请你根据所听内容，完成下面的表格。每空一词。
Smart Windows |
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Function(功能) | They can change from clear to dark and black again when people them. | |
Some Facts | ●They can make the world a and comfortable place. ●People could make the windows less bright to stay cool. ●Most people spend about percent of their time indoors. ●They of smart windows could mean that more energy can be saved. | |
