cull

1. V-T If items or ideas are culled from a particular source or number of sources, they are taken and gathered together. 采集[usu passive]

All this, needless to say, had been culled second-hand from radio reports. 不必说，这一切都是从无线电广播报道中搜集来的第二手信息。

2. V-T To cull animals means to kill the weaker animals in a group in order to reduce their numbers. 宰杀 (病弱动物以减少其数目)

To save remaining herds and habitat, the national parks department is planning to cull 2000 elephants. 为挽救余下的兽群及其栖息地，国家公园管理部门正计划杀掉2000头大象。

3. N-COUNT Cull is also a noun. (对病弱动物的) 宰杀

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，对病弱动物每年所进行的宰杀剔除已成惯例。

4. cullingN-UNCOUNT 杀死

The culling of seal cubs has led to an outcry from environmental groups. 宰杀海豹幼仔的行为已引起了环保团体的强烈抗议。