to-and-fro

Pat rolled the trolley to and fro.

帕特来推着手推车。

Those boats are prepared for waftage to and fro.

那些船舶用来来运送货。

They travel to and fro between London and Paris.

们奔走于伦敦和巴黎之间。

Wilkie watched the to and fro of their dancing.

威尔基看着们来来地跳舞。