C2 a unit for measuring area, equal to 4,047 square metres or 4,840 square yards英亩(=4047平方米或4840平方码)
More examples
The mansion is set in 90 acres of beautiful, unspoilt countryside.
The college is surrounded by 70 acres of parkland.
The Forestry Commission is responsible for preserving over 2 million acres of woodland.
Major wildfires have destroyed thousands of acres in Idaho, Oregon and Montana.
The field was about ten acres in size.
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