Which statement about the differences between meals and snacks is NOT TRUE?

参考解析：

细节理解题。根据第二段第一、二句“A meal is usually defined as the consumption of two or more foods in a structured setting at a set time. Snacks consist of a small amount of food or beverage eaten between meals.”可知，一顿饭通常被定义为在一个固定的时间在一个有组织的环境中食用两种或两种以上的食物，零食是指在两餐之间吃少量的食物或饮料，所以A项和C项表述正确；根据第二段第四句“A common eating pattern is three meals (breakfast, lunch, and dinner) per day, with snacks between meals.”可知，一种常见的饮食模式是每天三餐（早餐、午餐和晚餐），两餐之间有零食，所以每天不只一次吃零食时间，所以B项表述错误；根据第二段第三句“Often biscuits, chocolate, fruits, nuts, popcorn, sandwiches, and sweets are used as snacks.”和最后一句“The components of a meal vary across cultures, but generally include grains, such as rice or noodles; meat or a meat substitute, such as fish, beans, or tofu; and accompaniments, such as vegetables.”可知D项表述正确。故选B。