A lot of research is going into efforts to develop drought- resistant crops.

很多研究都致力于培育抗旱作物。

Farmers here can grow only a few drought-resistant crops, and so when a food crisis happens they are forced to buy grain at very high prices.

那里的农民只能种植几种耐旱作物，因此，一旦发生粮食危机，他们就要被迫以非常高的价格购买粮食。