vt.挑选，剔除,采，摘（花）,精选 n.拣出的东西,剔除
the annual seal cull
每年对海豹的选择性宰杀
To save remaining herds and habitat, the national parks department is planning to cull 2000 elephants.
为挽救现存兽群和它们的栖息地，国家公园部计划选择性捕杀2,000头大象。
It is usually good practice to cull the poorest prior to field planting.
通常在实践上的好方法是在出圃栽植前挑出最弱的苗木.