副词来回地，往复地

1. 到处：to a T 恰好地 | to and fro 到处 | to doctor it up with 用...作料拌起来

2. 来回：time and tide岁月 | to and fro来回 | town and country乡村

3. 来来往往：Tit for tat 针锋相对 | to and fro 来来往往 | To be or not to be : that is the question. 生与死是至关重要的问题

adv

1. moving from one place to another and back again

e.g. 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

Synonym: back and forthbackward and forward