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。
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。
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。
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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