to-and-fro

They travel to and fro between London and Paris.

他们奔走于伦敦之间。

Wilkie watched the to and fro of their dancing.

威尔基看他们地跳舞。

Pat rolled the trolley to and fro.

帕特手车。

Those boats are prepared for waftage to and fro.

那些船舶是准备用运送货物的。