Subsequent invocations move the iterator backward or forward by the required distance.

后续的调用会将迭代器前后移动指定的距离。

youdao

During the tests, participants were told to step four paces to the left, right, backward or forward.

在测试过程中，受试者还被要求向前、或向后、或向左、或向右走4步。

youdao

As such, consider making the frames play backward or forward in time depending on which button was clicked.

因此，帧在时间上是反向播放还是正向播放，取决于按下了哪一个鼠标按键。

youdao

Here,he uses a set of buttons attached to a computer to make the silent robot move forward, backward or around in circles.

VOA: special.2009.12.17

And now since it's reversible, we can run it forward or backward.

因为它是可逆的，所以可以正方向运行。

麻省理工公开课 - 热力学与动力学课程节选

If that's all it knows, then in that scenario there is no building or anything else; it continues a trajectory both forward in time and backward in time, and it says that whatever seconds, one second before you set your clock to 0, it would've been on the ground.

如果是这样,在那种模式下,没有楼房或者别的什么,物体的运动轨迹可以沿时间可以向后延伸,也可以向前延伸,不管时间取什么值,在零点前一秒时,物体就在地面上

耶鲁公开课 - 基础物理课程节选

While you're looking at the screen, you can tilt the phone backward or forward to scroll up and down.

CNN: Hands-off with the Samsung Galaxy S IV

Tapping once on a book opens it for viewing and you swipe forward or backward to turn pages.

WSJ: Review of KeepShot: Hassle-Free Photo Books in One Couch Sitting

Still, it was a neat trick to flip instantaneously to any frame in the movie and watch the action unwind either forward or backward.

FORBES: I want my DVD