相关单词近义词 effective 有效的, useful 有用的, practical 明智的, valuable 贵重的, utility 效用, favorable 有利的, profitable 有益的, advantageous 有利的, durable 耐用持久的, strong 强烈的, hard-wearing [经] 耐磨的, stout 强壮的, sturdy 强健的, working 做工作的, operative 有效的, functional 功能的in working order, 能正常发挥功能, 处于正常..., usable 可用的, helpful 有帮助的, utilitarian 功利的反义词unserviceable, 无用的临近词servile, service, serviceable bife, serviceable tool, serviceable life, serviceable time, serviceable range, serviceable label, serviceable wagon, serviceable shoes, serviceable chest, serviceable stores 返回 serviceableness