然后他提出了一个结合人类捕猎和环境压力的场景。
Then he came up with a scenario that combined some hunting by humans with some environmental stress.
约翰逊：还有，最先进的物种，比如人类和类人猿，是数百万年前物竞天择的压力和基因突变两者结合作用下的产物。
Another thing: the most developed species, like humans and apes, are products of a very specific combination of selection pressures and genetic mutations over millions of years.
奥巴马会发现要抵挡住和克林顿夫人“被迫结合”的压力真的好难。
Mr Obama will find it hard to resist pressure for a shotgun marriage to Mrs Clinton.
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