At the same time the us has been flexing its diplomatic muscle .

与此同时，美国一直在展示自己的外交力量。

Constant flexing of the structure concentrates stress , which leads to microscopic cracks .

这些构造部位的频繁伸缩使应力集中，导致微裂纹的产生。

Regular flexing and exercise of fingers and wrists are essential .

一定要经常地弯曲、活动手指和手腕。

Facebook is really flexing its muscles today .

facebook又要大展拳脚了。

Democratic leaders are already flexing their muscles on financial regulation and one of his first tasks will be to choose the new treasury secretary to implement reform .

民主党领导人已开始炫耀他们在金融监管方面的力量，他的首要任务之一就是选出执行改革的新财政部长。