asphalt
/ˈæsfɔlt/ 名词 B2中文： 沥青、沥青混凝土、柏油
- A sticky, black to brown and highly viscous liquid or semi-solid, composed almost entirely of bitumen with small mineral particles, that is present in most crude petroleums and in some natural deposits. · The mining of asphalt was big business in this area in the early twentieth century.
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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.
Several forward-thinking cities are installing special asphalt on highways to significantly reduce tire noise.
Before these sprawling ribbons of asphalt conquered the landscape, traversing the vast continent was a grueling test of automotive endurance.
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