( utilities) [, ]a service provided for the public, for example an electricity, water or gas supply公用事业◆the administration of public utilities公用事业管理 [] a company that provides a service for the public, such as electricity, water or gas公用事业公司◆the world's largest private electricity utility全球最大的私营公用电力公司 () [] a piece of computer software that performs a particular task应用程序◆an anti-virus utility反病毒应用程序 () [] the amount of benefit or satisfaction that sb gets from using a product or service效用；实用性◆Water has high utility but low commercial value.水具有很高的实用性，但商业价值很低。