MOVE something OR somebodygoing in one direction and then in the opposite direction, and repeating this several times 来回地
We travel back and forth all the time between Canada and England.
我们一直是在加拿大和英格兰之间来回跑。
He was pacing back and forth.
他在来回踱步。
Examples from the Corpus
back and forth• The chairsqueaks when you rockback and forth.• They passed it back and forth.• This gives you the freedom to move back and forth and swing your arm - you must feel free!• To switchback and forth between the two documents, press Shift-F3.• My feet hurt, and the side window waggledback and forth each time I kicked it, but nothing else happened.• A few of the mountsshifted their feet; here and there a riderslid his swordback and forth in its scabbard.• It goes back and forth though.• Petey heard him trying to brave it out, rocking back and forth to make the painsubside.• The road twisted, two lanes of blacktopanglingback and forth up the side of the mountain.• Brach fliesback and forthweekly, between New York and L.A.