Stepchildren are at greater risk because evolutionary pressures have shaped parental psychology to favor genetic offspring.

继子女面临更大风险，因为进化压力塑造了父母更偏爱自己基因后代的心理。

The human mind is a set of information-processing machines that were designed by natural selection to solve adaptive problems faced by our hunter-gatherer ancestors.

人类心智是一套信息处理机器，由自然选择设计来解决我们狩猎采集祖先面临的适应性问题。