| 单词 | to-and-fro | 
| 释义 | to-and-fro1 of 3noun   ˌtü-ən-ˈfrō    : activity involving alternating movement in opposite directions  the busy to-and-fro of the holiday shoppers to-and-fro2 of 3 adjective  : forward and backward   to and fro3 of 3 adverb  : from one place to another   | 
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