有时一种生物为了生存而杀死另一种生物，所以它们形成了食物链。
Sometimes one living thing kills another to live, so they form a food chain.
为了应对预期将至的入侵，考虑到公共安全，动物们经常被杀死——大型猫科动物和熊类会因围栏在战斗中损毁而逃逸，这对城市防卫来说无异于雪上加霜。
Animals are often killed in anticipation of an invasion, out of concern for public safety — big cats and bears escaping their battle-damaged enclosures tend to complicate the defense of a city.
大部分的动物都在大概8个月大时被杀死，这是为了拿它们第一次为过冬而长出的毛。
Most fur animals are killed for their first winter coat, aged about eight months.
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