breeding gain

例句：

1. 1. The breeder is hoping to increase the number of successful offspring through selective breeding.
   育种者希望通过选择性育种来增加成功后代的数量。
2. 2. The research team has discovered a new method for increasing breeding gain in livestock production.
   研究团队发现了一种提高畜牧业生产中育种增益的新方法。
3. 3.The farmer believes that genetically modified crops can lead to higher breeding gains and reduced environmental impacts.
   农民认为，转基因作物可以带来更高的育种增益并减少对环境的影响。