selective impulse

例句：

1. 1. The research team is studying the effects of selective breeding on crops.
   研究团队正在研究选择性育种对农作物的影响。
2. 2. She chose to go to the beach rather than the mall because she was more selective about her activities.
   她选择去海滩而不是购物中心，因为她更注重自己的活动。
3. 3.The company is known for its selective hiring practices and strict standards.
   该公司以其选择性招聘和严格的标准而闻名。