If evolutionary relatedness does not determine sleep time, then what does? 所以，如果动物之间的演化关联性不是决定睡眠时间的因素，那会是什麽？
We found technological complexity is the most important factor to gain profit.When selecting product items, product relatedness is also a very important concern. 研究发现技术复杂度是决定获利的最重要因素，在选择产品开发项目时，产品关联性亦是一个重要的考量。
