junk food

Try to limit junk food to an occasional treat rather than a daily habit.尽量把垃圾食品当作偶尔的奖赏，而不是变成每天的习惯。

Studies show that children who regularly eat junk food perform worse in school on average.研究表明，经常吃垃圾食品的儿童在学校的平均表现更差。