You may use the Page Up and Page Down keys to move through the text file.

你可以用Page Up 和 Page Down 键来移动文本内容。

youdao

Also to refine that you can use the Page Up and Page Down keys to move frame by frame within the timeline, and adding shift to the mix moves you 10 frames either way.

你可以使用 Page Up 和Page Down 键来以帧为单位移动时间标尺，另外，如果想要更快移动，加按Shift。

youdao

So this is a little bit trickier to look at and see what it means, but essentially we have two hybrid orbitals, which are shown in blue here, and then we have one p orbital that's left alone that's going up and down on the page.

看这个图肯能会觉得比较诡异，但本质上，骂我们有两个杂化轨道，这里用蓝色表示，还有剩下一个p轨道,在图中上下方向上。

麻省理工公开课 - 化学原理课程节选

Writing on a Facebook page set up to help track down Mr Templeton, his family issued a note of thanks for all the support it had received over the past five and a half years.

BBC: Alan Templeton

Between the display limitations and the stuttering required to scroll up and down a page, there aren't a lot of nice things to be said here -- and in that case, it's not all that different from browsers on competing devices.

ENGADGET: Amazon Kindle Paperwhite review

Next up on the list of hover-friendly additions, you can now use your S Pen to scroll up and down on a page or list.

ENGADGET: Samsung Galaxy Note II review Mobile