柯林斯詞典to and fro →see to 返回 to and fro劍橋詞典in one direction and then in the opposite direction , a number of times 往復(fù)地；來(lái)回地 She was gazing out the window , rocking rhythmically to and fro . 她注視著窗外，身體有節(jié)奏地來(lái)回?fù)u晃著。 返回 to and fro