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perpetual motion

Word family
perˌpetual ˈmotion noun [uncountableU]  
the ability of a machine to always continue moving without getting energy from anywhere else, which is not considered possible 〔不需外加能量的〕永恒运动〔被认为不可能〕
Examples from the Corpus
perˌpetual ˈmotion noun
Chinese
Syllable
Corpus

See also: perpetual motion


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