cull

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。

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。