When the British Labour Force Survey asks people whether they are depressed, the U-bend becomes an arc, peaking at 46.

当英国劳动力调查询问人们是否郁闷时，U型变成拱型，在46岁时达到顶点。

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By means of lots of lightning impulse tests, power frequency arc tests as well as bend loading tests, a kind of clamping post composite insulators with matching insulation hoods is developed.

通过大量的雷电冲击放电试验、工频电弧试验和弯曲负荷试验等试验研究，研制出了一种放电箝位柱式复合绝缘子和配套的绝缘罩。

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Instead, you should perform "short-arc" exercises where you only bend your knees to the degree shown in these pictures.

反之，你应该做“短弧”练习，你只能如图示程度弯曲你的膝盖。

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Today, we celebrate a man whose clarion call stirred our Nation to bridge our differences, and whose legacy still drives us to bend the arc of the moral universe toward justice.

WHITEHOUSE: The White House

We respect one another and understand one another, and we share a belief that through bold yet pragmatic action, our generation can bend the arc of history toward justice and towards progress.

WHITEHOUSE: President Obama and President Sarkozy at the White House

It's the answer that led those who have been told for so long by so many to be cynical, and fearful, and doubtful of what we can achieve to put their hands on the arc of history and bend it once more toward the hope of a better day.

NPR: Transcript Of Barack Obama's Victory Speech