Selective breeding could someday give us shorter plants with better protein and higher grain yields.

有朝一日，选择性育种可能会给我们带来更矮的植物、更好的蛋白质和更高的谷物产量。

Grain yield, or " how much food we got out of each plot, " was significantly higher for modern wheats.

现代小麦的粮食产量，或“我们从每个地块中得到多少食物”明显更高。