《合作的进化》是2007年1月1日上海人民出版社出版发行的图书，作者是（美）阿克塞尔罗德。本书是行为领域的经典之作，主题是合作的产生和进化。
有一种理论认为，两足动物的进化与核心家庭有关：一夫一妻制的父母合作照顾他们的后代。
One theory is that bipedality evolved in conjunction with the nuclear family: monogamous parents cooperating to care for their offspring.
这可能在人类社会进化早期的某个时候已经发生了，那时候为了生存，人们被迫合作打猎或采摘野果。
This could have happened at some point early in human evolution, when in order to survive, people were forced to cooperate in hunting game or gathering fruit.
但是一些植物，包括玉米和高粱，进化成了使用C4型的光合作用。
But some plants, including maize and sorghum, have evolved to use a type called C4.
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