原声例句
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and this is something I'm going to return to on Wednesday actually, behaviorists have provided powerful techniques for training, particularly for nonverbal creatures.
实际上我周三的时候会来讲讲这个，行为主义者们发明了,在训练非言语生物方面，非常有效的训练技术。
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Altruism" is the biologists' term meaning kindness,generosity, and evolutionary biologists have worked really hard to explain why animals might evolve to be kind.
利他主义是生物学术语,意思是善良，慷慨，进化生物学家努力去解释,为什么动物进化趋向善良。
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Bioterrorism?
生物恐怖主义
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