[ C ] formal a service that is used by the public, such as an electricity or gas supply or a train service公用事业;(电、煤气、铁路等)公共设施
More examples
the administration of public utilities
The utility of this substance has been proven in a series of tests.
[ U ] formal the usefulness of something, especially in a practical way有用性;(尤指)实用性
noun¹
noun²
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