translation.en: Because the repulsive gravity of an invisible energy in space -- we now call it dark energy, but I've made it smokey white here so you can see it -- its repulsive gravity would cause each galaxy to push against every other, driving expansion to speed up, not slow down.
translation.zh: 因为空间中的 这种无形能量的排斥重力-- 我们把它叫做暗能量， 但这里我把它用白色烟雾表示是为了便于看到-- 它的排斥重力 会导致每个星系互相推斥， 驱使扩张加快 而不是减缓。