英语词汇“perpetual motion”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词

perpetual motion

释义

Noun: perpetual motion

Motion that continues indefinitely without any external source of energy; impossible in practice because of friction

Derived forms: perpetual motions

Type of: motion

Encyclopedia: Perpetual motion

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