Some natural disaster killed a whole herd of dinosaurs in the area.
某种自然灾害致使该地区的恐龙群死亡。
Adam: This plate has a whole herd of bacteria, with one frosty-looking colony in the middle.
亚当：这个培养皿中有个完整的微生物群，中间那个看起来像雪花的是外来入侵者。
But when you have a large population, well, the whole population can't just get up and move to follow a wild herd of animals.
但是当你所属的种群人数众多时，就不能整个种群一起追踪一群野生动物。
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