相关单词同義詞helpful, beneficial, advantageous, conducive, assistant, 近義詞 advantageous, beneficial, helpful反義詞useless臨近詞useless, used, usefully, useful at, useful in, useful to, usefulness, useful map, useful top, useful for, useful time, useful work相似詞use sth up, use your head idiom, use your loaf idiom, used, useful idiot, usefully, usefulness, useless, 返回 useful