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With democratic voters depressed and mr obama off the ballot , reversals are inevitable .

但是现在民主党的支持者受挫，奥巴马选票失利，不可避免事态朝反向发展。

Admittedly , every time an airliner takes off and lands it goes through a demanding cycle of stress reversals .

诚然，飞机每次起飞和着陆都会经历一次应力反向的费力周期。

Other markets also saw sharp reversals .

其它市场也呈现了剧烈反转的态势。

Some believe that the hardened gray iron used to make the components simply " fatigues " with age-as metal parts that go through millions of stress reversals eventually do .

有些人认为硬化的灰铸铁过去曾使零件很容易腐朽老化（因为经过数百万次的应力反向处理后的金属零件最后都会这样）。

As the stress level is gradually reduced , there comes a point where a structure can survive enough stress reversals to exceed the component 's expected life .

当压力水平逐渐减小，有一点就是，一种结构能够经历足够应力反向之后继续存在以超越组件的预期寿命。