Englishfor English speakers
coverage
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noun
the extent to which something is covered
the dictionary's coverage of standard English is excellent
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noun
the total amount and type of insurance carried
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noun
the news as presented by reporters for newspapers or radio or television
they accused the paper of biased coverage of race relations
diagram
Noun
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A diagram is a drawing, or sketch, to show how something, such as a machine, works.
You can see from this diagram that the electric switch is very simple, in fact.
Here is a diagram of some machines in a power plant.