translation.en: Einstein also realized -- and this is the real meat of the matter -- that if you put energy or mass in the universe, it would curve space, and a freely falling object would pass by, let's say, the Sun and it would be deflected along the natural curves in the space.
translation.zh: 爱因斯坦还意识到－ 这可是真正最关键的部分（matter也有“物质”的意思）– 如果你在宇宙中放入能量和物质， 宇宙就会弯曲。 自由落体的物体 在经过向太阳这样的天体时 将会被偏转 沿着空间中被弯折的路径运动。