带介词to的英语短语

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。

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。