2--Here is a popular term: Junk Food
 
1--What is junk food? Is it good for you?
 
2--I just ate a bag of photo chips, a couple of candy bars and two sodas.
 
1--Are you kidding? That's a lot of junk food. I thought you're on a healthy diet!
 
2--I am. Guess not.
 
1--The word junk means something that does not have value. I can be thrown away.
 
2--"Junk food" is food that's not good for you.
 
1--It is not the kind of food you want to eat if you are watching your weight or trying to be healthy.
 
2--But many Americans love "junk food".
 
===================================
注解：
 
1.popular流行
2.junk垃圾
3.weight体重

===================================
译文：

1--在美国，谈论食物是一个受欢迎的话题。
2--这是一个流行的术语：垃圾食品
1--什么是垃圾食品？它对你身体有好处吗？
2--我吃了一包薯条，一些糖果还有两瓶苏打水。
1--你在开玩笑吗？太多垃圾食品了。我以为你在健康饮食呢。
2--我是啊。我不这么想。
1--垃圾就是没有价值的东西，可以扔掉。
2--垃圾食品对你的身体没有好处。
1--如果你比较在意你的体重或是试着健康饮食，那么它不是你要吃的那种食物。
2--但是很多美国人都喜欢垃圾食品。