The best example of how associations influence eating is that we often eat not because we're hungry but because it's "lunchtime," because foods smell good, or because our friends are eating.

说明联想影响食欲最好的例子是我们吃东西经常不是因为感到饥饿，而是因为当时是“午餐时间”，或食物闻起来不错，又或者是我们的朋友正在吃饭。