Einstein watched it in delight, trying to deduce the operating principle.
爱因斯坦高兴地注视它，试图找出操作的原理。
Einstein tried to deduce the operating principle of the toy purely by reasoning.
爱因斯坦想通过纯粹的推理来推断出这个玩具的工作原理。
Einstein tried to deduce the operating principle of the toy purely by reasoning, but he was in vain.
爱因斯坦想通过纯粹的推理来推断出这个玩具的工作原理，但却徒劳无功。
He has keen interest in theories and attempted to deduce the operating principle for everything, but didn't have the slightest interest in the practical application of the theories.
他对理论感兴趣并凡事都试图推断出原理，但他并不关心理论的实际运用。
He has keen interest in theories and attempted to deduce the operating principle for everything, but didn't have the slightest interest in the practical application of the theories.
他对理论感兴趣并凡事都试图推断出原理，但他并不关心理论的实际运用。
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