Most of our food production comes from four crops: wheat, maize, rice and sorghum.

我们大部分的粮食生产都来自这 4 种作物：小麦、玉米、水稻和高粱。

Worldwide, we get most of our calories from just three crops: maize, rice, and wheat.

在世界范围内，我们从三种作物中获取大部分卡路里：玉米、大米和小麦。

China's food security will also be threatened, as a warming climate is expected to affect yields of wheat, maize, rice, and fish.

中国的粮食安全也将受到威胁，因为气候变暖预计将影响小麦、玉米、大米和鱼类的产量。