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从荒芜的、没有捕食者的时代,到出现了第一个大型捕食者——生活在奥陶纪的长须平直石壳,再到诞生了在上新世海洋里横行一时的最大的肉食性鲨鱼
From the time of barrenness and predator, to the emergence of the first large predator, the long whiskers of straight rocks in Ordovician, to the largest carnivorous creatures that ran rampant in the Pliocene Sex sharks