back and forth片语

来回、往返

He paced back and forth in the waiting room for an hour.

他在候诊室里来回踱步了一个小时。

反复、来来回回

We emailed back and forth for weeks before settling on a date.

我们来来回回通了好几周的邮件才定下日期。

来回交流、反复商讨、争论

After months of back-and-forth, the two sides finally signed the contract.

经过几个月的来回商讨，双方终于签了合约。

来回的、反复的

The back-and-forth negotiations left everyone exhausted.

反复拉扯的谈判让所有人都疲惫不堪。