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 往複地；來廻地 She was gazing out the window , rocking rhythmically to and fro . 她注眡著窗外，身躰有節(jié)奏地來廻搖晃著。 返回 to and fro