In recent years, a shining city grew in the desert of Dubai on and even off -- the Gulf coast.

VOA: special.2009.12.04

We can actually see spatially all the details in the field animated as you turn the current on and off.

我们能看到,所有细节的空间动画分布,就在你打开电流和切断的时候。

麻省理工公开课 - 媒体、教育、市场课程节选

So I'm so happy that it's finally time for us to go to the airport, get on a plane and just take off.

所以当我们终于到了机场，坐上了飞机并起飞后，我真是太高兴了。

I've been 实战 - SpeakingMax英语口语达人

And the President's last offer to Speaker Boehner in December remains on the table- an offer that meets the Republicans halfway on spending and on revenues, and would permanently turn off the sequester and put us on a fiscally sustainable path.

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It flickers to life on-screen and appears to turn on and off when you shake the device it's on.

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Talks between the EU and Iran on the nuclear issue have been off and on for a number of years, with the last round ending in failure in January last year.

BBC: Fresh Iran nuclear talks agreed with world powers - EU