They switch on slowly, and they are reluctant to switch off.

它们启动缓慢，并且很难关闭。

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The engineers are also trying to develop an on-and-off "switch" where the glow would fade when exposed to daylight.

工程师们还试图研制一种间断式“开关”，当暴露在日光下时，光照会逐渐消失。

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You can then optionally switch on and off your extensions using method configurations as well as easily upgrade to newer versions of the original elements and reapply your changes.

这样你就可以使用方法配置有选择地打开或关闭你的扩展，还可以方便地把原始元素升级到更新的版本并重新应用你的变化。

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If it all sounds too much, Mrs Kramlich points out that living with media art is really no different from living with fixed-image art. (The couple have works by Andy Warhol and Joseph Beuys in their mock-Tudor San Francisco home.) The difference, she adds with an eye to California's electricity troubles, is that you have an on-off switch and when the images vanish, the house is an artwork of its own.

ECONOMIST: Showing video art: The glasshouse effect | The

We're not exactly sure what makes these virus transistors so special, but apparently the transistors they've built out of the nano-coated strands, and sandwiched between two electrodes, are easy to switch between ON and OFF states, since they don't need to build up a charge at a lame-o capacitor before they can be switched.

ENGADGET: Platinum-coated virus to be used for speedy memory

The screen can also be turned on and off using the switch, enabling one-touch operations.

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