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insulation

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definition: 
The action of insulating something
sentence: 
You can keep your home warmer through insulation.
difficulty: 
medium
toefl frequency: 
2
adverb: 
adjective: 
adverb sentence: 
adjective sentence: 
verb: 
insulate
verb sentence: 
With hot water heating systems, the diameter of the piping remains constant, the slope is irrelevant, and all lines are insulated to prevent heat loss.