In the reserves of Zimbabwe and South Africa, annual culls are already routine.在津巴布韦和南非的自然保护区，每年的选择性捕杀已成惯例。Big business culls the brightest from among college graduates.大企业从大学毕业生中选拔最优秀的人材....

culls的音标：...

n.挑选，剔除( cull的名词复数 )v.挑选，剔除( cull的第三人称单数 )...