Production volumes that year dipped by nearly 20%, the fourth straight year of decline.

那一年的产量下降了近20%，这是连续第四年下降。

But today, the three grains that rank top in terms of their production volumes are rice, wheat and corn.

而今天中国粮食产量的前三名已经变成稻谷，小麦和玉米。

Initially, things will be expensive because it'll be a new technology at low production volume.

最初，事情会很昂贵，因为它将是一种低产量的新技术。