2 文書を見つけるための辞書。

• backward and forward, to and fro, back and forth
• 行ったり来たり
• moving from one place to another and back again; "he traveled back and forth between Los Angeles and New York"; "the treetops whipped to and fro in a frightening manner"; "the old man just sat on the porch and rocked back and forth all day"
• ある場所から別の場所に移動し、再び戻る

• up and down
• 行ったり来たり
• moving backward and forward along a given course; "he walked up and down the locker room"; "all up and down the Eastern seaboard"
• 特定の進路を行ったり来たりする