一年前，美国的经济已经停止收缩，但是美国失业问题仍然像以前一样严峻。
THE economy stopped shrinking a year ago, but America’s unemployment problem is as big as ever.
一种智能织物通过太阳能取得能量；另一种在通电后能像人造肌肉那样收缩。
One smart fabric generates energy from sunlight; another contracts like an artificial muscle when a voltage is applied.
当你猛地向前一倾的时候，你全身的肌肉就会收缩得像一只拳头，看不到前面有人从你身边擦身而过。
You crash forward, your muscles contracting like a fist, and you can't even see that people are running away from you because something has forced your eyes shut. And then it's over.
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