来自《耶鲁大学开放课程：有关食物的心理学、生物学和政治学 第20集 第20集》

• 
  
  would you like juice or fruit?
  你要果汁还是水果
• 
  
  Because both fruit and 100% juice would count as a fruit serving.
  因为水果和百分百果汁都相当于一份水果
• 
  
  Basically, the implication of that question is
  基本上 这个问题的潜台词就是
• 
  
  you're taking one or the other--which one would you like?
  你要在两者之间选一个
• 
  
  They did that, and in the control schools what I have here
  他们这样做了 在控制条件学校我发现
• 
  
  is showing how many kids took the juice
  很多学生都选择了果汁
• 
  
  and the--I mean the fruit and the juice,
  我指的是在水果和果汁中
• 
  
  and how many kids actually then ate the juice and the fruit.
  到底多少学生是真的吃了水果或果汁的呢
• 
  
  I had parent volunteers go in and observe,
  我让一些家长志愿者进行了观察
• 
  
  and then we collected the trays at the end
  最后我们收集了那些盘子
• 
  
  so we could actually measure and see how much they ate.
  从而我们能准确的知道他们吃了多少
• 
  
  What you can see is about 65% of the kids took
  你能看到有65%的孩子选了