Flipping forth and back between those two states is a good test to check for basic client functionality.

在这两个状态之间来回切换可以测试基本的客户机功能。

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The prosecution and defence were bandying accusations back and forth.

原告与被告你来我往，互相指责。

《柯林斯英汉双解大词典》

He paced back and forth.

他来回踱步。

《柯林斯英汉双解大词典》

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

"After a week of back and forth and forth and back over firearms, it's good to see a consensus developing on this common-sense amendment to keep handguns away from children, " Kohl said Tuesday.

CNN: Gun control again heats up juvenile crime bill debate

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

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

WSJ: In Boston, Families Grapple With Long Road Ahead