Black hole is where the gravitational force is so strong that it bends light to the greatest extent : light cannot escape 黑洞是引力极强之地，光线路径扭曲的程度，足以令光线无法逃跑。
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Last september they put their plan into action when jupiter passed close to the line of sight between earth and a quasar 去年9月，当木星接近一条从某个类星体射向地球的光线路径时，他们便开始将计画付诸行动。
