Englishfor English speakers
traffic
Noun
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Traffic is the things that move along a path, especially cars on a road.
Traffic is slow at rush hour.
On holiday weekends there are traffic jams that stretch for miles.
He turned quickly, nearly getting hit by oncoming traffic.
Almost half of all traffic accidents are alcohol-related.
Why does it take the traffic lights so long to turn green?
As the amount of traffic on the Internet increases, there are more and more problems.
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Traffic is the buying and selling of goods, especially illegal goods.
Governments are working to prevent the abduction and sale of, or traffic in children.
traffic
Verb
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If you traffic in certain goods, you buy and sell them, especially illegally.
They were arrested for trafficking in stolen goods.
density
Noun
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Density is how much stuff fits in a particular area.
The population density of Singapore is one of the highest in the world.
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The density of a material is how closely packed its atoms are.
The density of water is higher than the density of steam.