fro

Pat rolled the trolley to and fro.

帕特来回推着手推车。

Those boats are prepared for waftage to and fro.

那些船舶是准备用来来回运送货物的。

They travel to and fro between London and Paris.

他们奔走于伦敦和巴黎之间。

Wilkie watched the to and fro of their dancing.

看着他们来来回回地舞。

In a huge sideways jumps called a grand jete, a skillful ballet dancer seems to float fro an impossible length of time.

在一种大幅度的侧动作（小）中，一个技艺精湛的芭蕾舞演员好像在空中可以停上一段让人难以置信的时间。