You're--and to put it in a crude way, you're teaching the dog that the bell goes with the food.
简单地说,你在让狗知道,铃声和食物是一起出现的。
We remember the fish that we used to eat free in Egypt Okay, we were slaves, but the food was free, you know?
我记得以前在埃及的时候不花钱就可以吃鱼,虽然我们是奴隶,但是食物是免费的,你知道吗?
You may know from reading food labels that these ingredients in any food label are listed in order of how much there is in the food itself, so sugar comes right after peanuts.
看看食品标签你就会知道,食物配料都列在食品标签上,以它在食品中的含量多少的顺序排列,所以糖的含量仅次于花生
Those of you who are familiar with what's going on in New York City may know that if you're in a New City restaurant now you cannot eat trans fats, because trans fats have been banned from the restaurants.
你们中间对纽约很了解的人,可能知道在新城饭店,你吃不到含有反式脂肪的食物,因为餐厅里面全面禁止该种食物
If you think about what ancient food gathering habits used to be like, you see things like this where people are out gathering food that is growing naturally, and you can think about what would-- what sort of conditions this would create and what kind of hardships it would create.
如果你想知道古代食物采集的习惯,请看这张图,人类都在野外采集自然生长的食物,你可以设想到,条件有多恶劣,生存有多艰难
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