In theory, this could one day provide a key component of any nanoscale electrical circuit-a way to mechanically turn the current on and off or change its direction.

理论上讲，这种机械切换电流通断或方向的方法，或许有一天会成为任何纳米尺度电路的关键元件。

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Aware that there would be trouble in the markets the following day, Sants told the London Clearing House to call off a planned software change to its systems.

桑茨意识到第二天市场将会出现波动，他让伦敦结算所(London Clearing House)取消改变其系统软件的计划。

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They change therapist without informing customers, whether they are on MC or off for the day.

他们改变了治疗，没有通知客户，无论他们是在三菱商事或关闭一天。

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Australia's biggest city, Sydney, has switched off its lights for an hour as the Earth Day climate change protest gets under way across the globe.

BBC: Sydney dims down for Earth Hour climate change protest

When companies such as Facebook, Google, YouTube and Twitter started off, were the founders aware from day one that they may change the world?

FORBES: By all means.

A. Any change in the plan even if an extra day of a certain treatment was added was signed off by the C.

NEWYORKER: The Black Sites