相关单词同義詞in advance, ago, formerly, ahead, back, 近義詞 before 在 ... 以前, formerly 以前, already 已經, once 一次, beforehand 預先, earlier 早的, in the past 在過去（通常用於一般過去..., hitherto 到目前爲止, heretofore 以前, antecedently 在前地臨近詞previous, previous step, previous mark, previous year, previous case, previous cell, Previous Menu, previous judg, previous data, previous icon, previous night相似詞preventive, prevertebral, preview, previous, prey, prey on sb, prey on sb's mind idiom, prey on sth, 返回 previously