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单词	dark energy
释义	dark energyˈdark ˌenergy noun [uncountable] technical a type of energy that scientists think is pushing things in the universe further apart
随便看	up-and-coming Upanishads upbeat upbraid upbringing UPC upcharge upchuck upcoming up-country upcycle upcycling update Updike, John updo upend upfront upgrade upheaval uphill uphold upholder upholster upholstered upholsterer

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