另一方面，与动物行为研究学家相反，许多进化生物学家认为情感的主要作用还是帮助生存。
On the other hand, many evolutionary biologists, in contrast to animal behaviorists, acknowledge some emotions primarily for their survival function.
动物行为学家已经研究这些猴子几十年了。
Animal behaviourists have been studying these monkeys for decades.
Kevin Richardson是一位动物行为学家，他对非洲大陆的本土动物作过广泛的研究。
Kevin Richardson is an animal behaviorist and has done extensive research on native animals of Africa.
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