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John liao Posted 12 years ago
Vocabulary
had a layer of foam around them?
These are tiles that are designed to store energy from the sun. And the walls had a layer of foam around them too, to increase the insulation.
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what does "had a layer of foam around them" mean?
- what does "had a layer of foam around them" mean?
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It means the walls were insulated with an extra layer of insulating foam, to conserve more energy.
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