rooftop
/ˈɹufˌtɑp/ 名词 B2中文： 屋顶面
- The area atop a roof.
- The top layer of a roof; the material covering or composing a roof.
复数 rooftops
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Multiply that by thousands of rooftops, add asphalt streets and the warm air pumped out by countless air conditioners, and you end up with what scientists call an urban heat island: a city that stays noticeably warmer than the countryside around it, especially at night.
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