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A polymer is a giant molecule made up of thousands of atoms. It can be natural or man-made (synthetic). Many plastics in everyday use are polymers, such as polythene or PVC; but then so is cellulose, which makes up wood pulp from which paper is manufactured.

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Μέρος του λόγου: noun
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Κλάδος/Τομέας: Natural environment
Category: Climate change
Company: BBC
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Κλάδος/Τομέας: Γλώσσα Category: General language

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Received Pronunciation (RP), also called the Queen's (or King's) English,[1] Oxford English,[2] or BBC English, is the accent of Standard English in ...