When you turn a switch, you can easily operate lighting, heating or power-driven electrical devices.

旋动开关，就能轻而易举地启动照明设备、供热设备和电动装置。

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A vessel of less than 20 metres in length or a sailing vessel shall not impede the safe passage of a power-driven vessel following a traffic lane.

帆船或长度小于20米的船舶，不应妨碍按通航分道行驶的机动船的安全通行。

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Every vessel shall proceed at a safe speed adapted to the prevailing circumstances and conditions of restricted visibility. A power-driven vessel will have her engines ready for immediate manoeuvre.

每一船应以适合当时能见度不良的环境和情况的安全航速行驶，机动船应备好车以备紧急操纵。

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Early versions of new labor restrictions still being hashed out in Congress would have barred children under 16 from operating power-driven farm equipment and kept anyone under 18 from working at agricultural co-ops and stockyards (the latest version would let kids keep running machines on their parents' spreads).

WSJ: The Panic Over Bullies

Heartening news rang forth from the renewable energy sector this week as a UN-backed study reported that the building of new renewable energy plants has officially overtaken fossil fuel plants in Europe and the US. We also took a look at two brand new types of power plants -- the world's first hydrogen-driven power plant in Italy and the first hybrid coal-solar power plant in Colorado.

ENGADGET: Inhabitat's Week in Green: of mirror cubes and urban icebergs

And as our economy gets back on track, consider the power behind songwriter-driven small businesses that provide jobs in every state.

FORBES: We Need Strong Copyright Laws Now More Than Ever