the vegetables that may not be the highest in nutrients

这些蔬菜可能营养价值不是最高
but the ones that can last a long time without spoiling.

但却是可存放时间最长
In some cases, the ethnic mix makes stocking difficult,

有时候各民族混居也让储存变得困难
because you have so many different groups

因为在那些贫民区住
in some of the poor areas.

太多不同的族群
Some of the ethnic foods need to be imported because--

有些民族特色食品须进口
and that's why they're so expensive.

这也是为什么这种食物价格居高不下
The shopkeeper cannot pass along

店主也很难把成本
the cost easily to the consumers,

转嫁给消费者
because the consumers don't have much buying power;

因为消费者并没有这么大的购买力
and then there are few incentives for the larger stores to open.

对于大型商场来说诱惑就更少了
One question is, what happens when large,

问题是特大百货市场