引力。牛顿的苹果。艾萨克-牛顿(1642-1727)观察到一个苹果从苹果树上掉下来,发现了地球引力(重力)的规律。1925年的匿名插图。私人收藏。(Gravitation: Newton's apple. Isaac Newton (1642-1727) observes an apple falling from an apple tree and discovers the laws of earth gravity (gravite). Anonymous illustration from 1925. Private collection.)匿名匿名 |
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日期不详 · Engraving
· 图片ID: 915754
Private Collection / Bridgeman Images |
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