A second revolution happened 70 years later, when two groups of astronomers showed that the universe wasn't just expanding, it was accelerating, a surprise like throwing up a ball into the sky and finding out the higher that it gets, the faster it moves away.
第二次思想变革，发生在70年后， 两组天文学家证明， 宇宙不仅在膨胀， 还在加速。 这着实让人吃惊，如同我向天空扔出一个球， 但它飞到越高的地方时 飞离的速度却越快。