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牛顿从苹果落地发现了万有引力,瓦特看见炉子上烧水的壶盖被水汽顶起而受到启发,发明了蒸汽机。苹果与万有引力、水壶盖与蒸汽机,在一般人看来是
Newton found the gravitational force from the apple and Watt saw the lid on the stove boiling water was inspired and invented the steam engine. Apple and gravitation, kettle lid and steam engine, in the ordinary people seems to be