Eating patterns change over time. Ingredients cannot be seen before in a country might begin to appear in local markets, shipped from abroad. Migration causes cultures to change, and eating patterns invariably reflect new influences.
饮食习惯随时间的变化而变化。以前在整个国家里从没见过的材料可能会从国外运来，开始出现在当地的市场。移民引起文化变化，而饮食习惯无不体现出新的影响。
In the 20th century, few people have the time to go home for lunch，and many city dwellers find themselves in need of grabbing a bite to eat in a place close to their offices. As a result, the popularity of fast food and takeaway food has risen. In many urban areas, people who traditionally ate their main meal at midday now enjoy it in the evening，after work.
在二十世纪，很少有人有时间回家吃午饭，许多城市居民发现自己需要在一个接近他们办公室的地方吃东西。结果，快餐和外卖食品得到普及并有上升趋势。在许多城市地区，他们传统上吃主餐是在中午，而现在改到了晚上，在他们下班后。
Changing eating patterns have an effect on other aspects of society. Meals have traditionally been times when members of a family catch up with each other. Fast food and quick meals sometimes threaten such family get-together.
改变饮食习惯对社会有着其他方面的影响。膳食历来就是家人们聚在一起吃的。快餐食品和快餐有时候会这威胁到这样的家庭聚会。