You should see the flash-card screen roll down from the top right corner, stay for a bit, then roll back up.

应该可以看到 flash-card 屏幕从右上角滚下，停留一会儿，然后又向上滚回。

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In the coming years, large-screen televisions and computer monitors could roll up for storage.

不远的将来，大尺寸电视以及电脑萤幕将可以卷起来存放。

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When the pull line is pulled or loosened, the reel can rotate positively and reversely, which drives the screen curtain to roll up or fall down.

拉动或松开拉线，卷筒可正、反向转动，带动纱帘卷起或落下。

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As if to prove his point, Ballmer also welcomed onstage program manager Janet Galore, who gave brief demos of some Microsoft product prototypes, including a tabletop-like touch screen and a flexible, wafer-thin digital screen you can roll up like a piece of paper.

CNN: Microsoft's Ballmer touts 'best version of Windows ever'