来自《耶鲁大学开放课程：博弈论 第11集 第11集》

• 
  
  and suddenly there are two ants, right?
  现在一共有两只蚂蚁是吧
• 
  
  So this ant produces another ant,
  这只蚂蚁又生出来了另一只蚂蚁
• 
  
  someone without a computer,
  我找个没带电脑来的吧
• 
  
  and this ant produces another ant,
  这只蚂蚁生出来了这一只蚂蚁
• 
  
  so they're doing fine
  这种情况挺不错的
• 
  
  and the whole population is matching against other cooperative ants,
  整个种群中合作型的蚂蚁互相配对
• 
  
  and more ants are being produced and everything is fine and dandy,
  就会繁殖出更多的蚂蚁
• 
  
  everything looks good.
  一切看起来都很顺理成章
• 
  
  Sit down a second.
  各位先请坐
• 
  
  Now imagine that there's a mutation, a small mutation,
  现在我们假设突然产生了一个突变个体
• 
  
  and this small mutation involves a group of rather nasty uncooperative ants
  该小小的突变产生了另一种不合作的蚂蚁
• 
  
  so a scary mutation.
  可怕的突变啊