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。
