The forward and back buttons are moved into the TAB bar, placing them in the top-left corner of the window.

“前进”和“后退”按钮也挪到了标签栏，就是窗口的左上角。

youdao

The movement of the bell is forward and back, not up and down, with the goal to project the force forward and to resist by grounding into your feet.

壶铃的运动是前后方向的，而非上下，要实现此目的需要将力向前延伸，并通过双脚抓地来抵抗向前的拉力。

youdao

Her seat slides forward and back on tracks in the center of the cockpit, which increases the OARS 'Angle of attack as they enter the water — making each stroke longer and more efficient.

她的座椅下面有个轨道，因此座椅可以前后滑动，这样在桨入水时可以增大它们的迎角，使每一次划船时桨在水中停留的时间更长，从而更有效率。

youdao

The other three parts move forward and back through time and space.

VOA: special.2010.01.10

I'll take every view that Socrates puts forward as a view of Plato's, though I'll typically sort of run back and forth sort of in a careless fashion.

我会把苏格拉底提出的,所有观点都当做是柏拉图的,尽管我会随意地,将两者交替着说

耶鲁公开课 - 死亡课程节选

She says she's grateful to the women who helped her, and is looking forward to giving back however she can.

VOA: standard.2009.12.25

Wikipedia notes the act of "squirming or moving forward and back in one's seat while watching an exciting sporting event".

BBC: Sir Alex Ferguson: 10 things not everybody knows

Four buttons arrayed in a circle bring up the command menu, play and pause songs, and shift forward and back.

FORBES: IPod's A Winner

Like, you could rotate the view from any perspective, go forward and back in time, et cetera, like a video game in replay mode?

FORBES: Rupert Murdoch's Daily iPad Thingy: Is It a Newspaper?