When you run or walk, you land on the outside edge of your foot and roll inward.

当你走路或者跑步的时候，脚外侧首先着地，然后翻向内侧。

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AILERON, a hinged moveable part on the trailing edge of each wing for airplane roll (wing up and wing down) control.

副翼，铰连在每个机翼后缘的可动部件，用于控制飞机的滚转(机翼向上和向下)。

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With even and stable pressure roll hot stamping, this machine can stamp hot stamping foil on the edge of book back and photo album and it can be used for fine album and book back peripheral gilding.

滚压烫印，压力均匀恒定，把烫印箔烫印在书背、相册边上，适用于精美的相册、书背的周边烫印。

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Senator John McCain, the Republicans' 2008 candidate, and Sarah Palin, his running-mate, voiced similar misgivings: better to have helped the rebels clinch their victory when they appeared to be on a roll than come to their defence when they were at their last gasp on the edge of defeat.

ECONOMIST: Lexington