It's all about rotational mechanics. When you turn your hands over you're rotating them around their centre point, which is near the middle of your palm.

这是一个力学常识，当你翻转手掌时，手掌是以掌心为中心旋转地。

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When the clip is playing, he can wave a palm at the screen to call up the controls to rewind the video or turn up the volume.

当视频播放时，他可以对着屏幕挥动手掌激活控制菜单，倒回视频或者调高音量。

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The rate of this deforestation is rising as oil prices reach new highs, leading more industries to turn to biodiesel made from palm oil, which, in theory, is earth-friendly.

然而随着油价不断攀升，这里的森林砍伐正在愈演愈烈。 许多工厂都转向用棕榈油生产生物柴油，具有讽刺意义的是，这样的做法从理论上来说是环保的。

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This in turn will force Palm to revamp its technical support.

CNN: Palm focuses on blazing enterprise network trail

Boruc could only palm out Ronaldo's vicious long-range free kick for Berbatov to turn in the rebound, but the Bulgarian appeared to be in an offside position when the ball was struck.

BBC: Man Utd 3-0 Celtic

Like its predecessors, the newest PalmPilot, the Palm III, is one of the best-designed bits of consumer electronics ever made. 3Com's proprietary operating system, the Palm OS, is amazingly intuitive and perfectly adapted to a device that most users turn on for mere seconds at a time.

FORBES: Small and beautiful