English Story

牛顿密友手稿披露万有引力发现过程

It always falls down. That's how the apple helped Isaac Newton.

它总是垂直下落——苹果正是这样启发了艾萨克•牛顿。

In this photo taken Friday, January 15, 2010, Royal Society librarian Keith Moore holds the manuscript of memoirs="" src="/upimg/100123/4_030602_1.jpg" />