鸟类学家是专业的鸟人，他们不止在鸟种方面，在鸟类行为学、解剖学、生理学和鸟种进化史等方面都受过先进专业的科学训练。
An ornithologist is a professional birder with advanced scientific training about not only bird species but also about behavior, anatomy, physiology and bird species history.
科学家们在发现了400，000年前人类的残骸后，不得不重新书写现代人类的进化史。
Scientists could be forced to re-write the history of the evolution of modern man after the discovery of 400, 000-year-old human remains.
科学家：如今我们面前出现了进化史中的一个巨大缺口。
Scientist: There's a whole enormous gap of evolutionary history that's opened up beneath our feet.
科学家：如今我们面前出现了进化史中的一个巨大缺口。
Scientist: There's a whole enormous gap of evolutionary history that's opened up beneath our feet.
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