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. 不必說，這一切都是從無線電廣播報道中搜集來的第二手信息。

2. V-T To cull animals means to kill the weaker animals in a group in order to reduce their numbers. 宰殺 (病弱動物以減少其數(shù)目)

To save remaining herds and habitat, the national parks department is planning to cull 2000 elephants. 為挽救余下的獸群及其棲息地，國家公園管理部門正計劃殺掉2000頭大象。

3. N-COUNT Cull is also a noun. (對病弱動物的) 宰殺

In the reserves of Zimbabwe and South Africa, annual culls are already routine. 在津巴布韋和南非的自然保護區(qū)，對病弱動物每年所進行的宰殺剔除已成慣例。

4. cullingN-UNCOUNT 殺死

The culling of seal cubs has led to an outcry from environmental groups. 宰殺海豹幼仔的行為已引起了環(huán)保團體的強烈抗議。