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在美国麻省Amherst学院曾经进行了一个很有意思的试验。研究人员用很多铁圈将一个小南瓜整个箍住,以观察当南瓜逐渐地长大时,对这个铁圈产生的压力有多大。最初他们估计南瓜最大能够承
An interesting experiment was conducted at Amherst College in Massachusetts. The researchers hoisted a small pumpkin with a lot of hoops to see how much pressure the hoops would have on the pumpkin as it grew older. Initially they estimated the pumpkin can bear the largest