There has been so much controversy and back and forth on this over many years.

许多年来，这一问题引发了巨大的争议，出现了许多反复。

youdao

If Baby wags her tail high and back and forth, she's in her "happy place".

如果小宝尾巴摇得高高地还前后晃，她就是高兴的。

youdao

Vectors can be cast between vectors of other types, and back-and-forth between the vector types and the special quad type, but none of these casts perform any data conversion.

向量可以在其他类型的向量之间进行转换，并在向量类型和特殊的quad类型之间反复进行转换，不过这些类型转换都不能执行任何数据转换。

youdao

The road moves back and forth and around corners as it moves up the face of the mountain.

VOA: special.2010.09.08

The cookies were going back and forth and back and forth and the hearts up and down, well, this thing that we had that called a loop last week with a forever block with a statement inside of it is simply gonna look a little something like this.

这些饼干人来来回回的移动,还有这些爱心们上上下下地漂浮,都用到我们上周提到过的循环结构,当然还有个声明在里面，就有点像屏幕上,显示的这样。

哈佛公开课 - 计算机科学课程节选

So you can imagine a bead with a wire going through it and the bead can only slide back and forth.

你可以想象一个穿在绳子上的珠子,小珠只能前后滑动

耶鲁公开课 - 基础物理课程节选

She watched as the thread grew, and the bashers and supporters went back and forth.

CNN: She's racing to save the environment

It has been "back and forth, back and forth" between Brigham and Beth Israel.

WSJ: In Boston, Families Grapple With Long Road Ahead

And it just keeps going back and forth, back and forth, and that's why I don't think it's stopping.

NPR: Racial Tensions Overheat at L.A. High School