相关单词同义词validity, availability, 近义词 utility 效用, worth 价值, convenience 便利, value 价值, practicality 实际, helpfulness 有帮助, expediency 权宜, efficacy 功效, effectiveness 有效性, handiness 巧妙, advantageousness 有利, suitability 适当反义词uselessness, 无用临近词useful, useful voltage, useful methods, useful measure, useful purpose, useful mineral, useful storage, useful lessons, useful insects, useful animals, useful surface相似词used, useful, useful idiot, usefully, useless, user, user experience, user group, 返回 usefulness