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。