相关单词同義詞hour, circle, cycle, season, day, 近義詞 age, epoch, era, interval, term, time臨近詞periodic, perimeter, periodo, periodil, periodyl, periodate, periodide, periodize, periodcal, periodism, periodieal, periodates相似詞perimeter, perinatal, perineal, perineum, period piece, periodic, periodical, periodically, 返回 period