utility

utility
/ju:ˈtɪlətɪ; ju`tɪlətɪ/ n
1 [U] quality of being useful 有用; 实用; 效用; 功用
    [attrib 作定语]
a utility vehicle, ie one that can be used for various purposes 多用途车辆
    the utility value of a dishwasher 洗碟机的实用价值.
2 [C] = public utility (public).

牛津英汉双解词典