Go forward or back.

向后还是向前。

youdao

Yet I felt paralyzed. Unable to move forward or back, I spent most of the summer in a stupor.

但是我觉得自己瘫痪了似的无法行动，整个夏天的大部分时光我都在恍惚中度过。

youdao

Other iPad-style gestures take you forward or back and zoom into pages in Safari and shift from your desktop to Lion's Dashboard widgets — which may lead to confusing moments at first.

另一些操作也都应用了类似iPad的手势，比如在Safari浏览器中前进、后退、放大页面，在桌面和dashboard间切换等，一开始使用可能还会感觉有些晕。

youdao

If you slide your observation period forward or back, those bad returns often disappear fast.

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This process allows the artists to enhance the experience of each scene individually so that the appropriate elements are brought forward or back, depending on the scene.

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Viewing angles are sufficiently wide (you could accommodate three to four people huddled around this machine) -- that is, until you tip the screen forward or back, in which case images wash out quickly.

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