fro的中文翻译是什么意思

She stood up and began to pace to and fro.

她站起身，开始来回踱步。

The boat was rocking gently to and fro in the water.

小船在水中轻轻地来回摇荡。

They travel to and fro between London and Paris.

他们奔走于伦敦和巴黎之间.

Small boats busied to and fro.

小船来来往往地穿梭.

Branches waved wildly to and fro.

树枝猛烈地摇来摇去.