because they're more nutrient poor and more calorie dense.

因为这些食物更没有营养更高热量
There are differences depending on where you live in the world.

这些差异取决于你在什么地方
The issue of choice is interesting.

选择的问题很值得思考
As I mentioned before in class,

正如我这节课之前提到的
very often when people come to the United States

通常当人们刚来到美国
in fact one of our students in the videotape mentioned this before--

实际上在录像中的一个学生有提到这点
they're amazed by the number of choices

他们对海量的选择感到惊讶
and by the size of things that they were exposed too,

东西的分量也让他们吃惊
but people come to the U.S.

但人们来到美国
and they see a hundred

当他们惊讶地看到超市里有
different salad dressings in a supermarket, 50 different yogurts,

上百种沙拉酱五十种酸奶
cereals that would fill up a whole aisle with dozens and dozens of choices.

各式各样的麦片堆满货架