Radios need electricity.
Meaning: This means that radios need a source of power, such as batteries or an electrical outlet, in order to function.
Choice of Words: Radios are devices that can pick up and play sounds from far away. Need means to require or to have a necessity for something. Electricity is a form of energy that can power devices. So, 'Radios need electricity' means that radios require electricity to work.
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Related Expressions