and a lot of the farmland was under water at that point;

很多的农田都被淹没了
that stresses the crops. Drought, of course, stresses the crops;

这就是植物的生存压力干旱也一样
the changes in the acidity

土地酸度或者盐浓度的改变
or the salinity of the soil stresses crops;

也会给作物造成压力
possible you can genetically

也许你会改变作物的基因
modify the crops to resist those sorts of stresses.

使他们能够抵抗这些威胁
There is some hope that you could genetically

同样人们也希望改变作物的基因
modify crops to increase the nutrient yield from them.

能够增加产物的养分
If you grow a carrot traditionally,

你按照传统方式种植胡萝卜
or you genetically modify a carrot,

和种植转基因胡萝卜相比
would the genetically modified carrot have more vitamins, minerals,

后者是不是具有更多的维生素和矿物质呢
or whatever in it and give more nutritional punch per carrot?

是不是能够提供更多的营养呢