cross sterility

例句：

1. 1.The scientists discovered that the cross-sterility between different species was a major factor in the extinction of certain species.
   科学家们发现不同物种之间的交叉不育是导致某些物种灭绝的主要因素。
2. 2. In order to improve crop yields, researchers are exploring ways to overcome cross-sterility and increase genetic diversity.
   为了提高作物产量，研究人员正在探索克服交叉不育和增加遗传多样性的方法。
3. 3. The cross-sterility issue is particularly important for breeders trying to create hybrid plants with desirable traits.
   对于育种者来说，解决交叉不育问题尤其重要，他们试图创造具有吸引人特性的杂交植物。