selective release

例句：

1. 1. In selective breeding programs, animals are bred to have desirable traits.
   在选择性育种项目中，动物被培育以拥有吸引人的特质。
2. 2. The selective release of the virus has been a major concern for public health officials.
   病毒的选择性释放一直是公共卫生官员们的主要关切。
3. 3. The selective release of wild populations can help maintain biodiversity in the ecosystem.
   野生种群的选择性释放有助于维护生态系统中的生物多样性。