to的英语短语：to and fro；
例句：
She rocked the baby to and fro.
她来回摇动着婴儿。
The ship was rolling heavily to and fro.
轮船剧烈地颠簸着。
扩展资料
Various kinds of vehicles run to and fro in the street.
大街上往来的`车辆很多。
He hopped to and fro between London and Paris for the business.
为了这笔生意他曾不停地往返于伦敦和巴黎。
Your thoughts cannot be tossed to and fro like the waves of the sea.
你的思考不能像大海的波浪一样起伏。
