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1. Oxford American Dictionary

   dark energy

   • n.
     a theoretical repulsive force that counteracts gravity and causes the universe to expand at an accelerating rate

   • noun: dark energy, plural noun: dark energies

2. • 釋義

   n.

   名詞

   • 1. a theoretical repulsive force that counteracts gravity and causes the universe to expand at an accelerating rate Einstein's theories allow for the possible existence of dark energy