Since shaking is not healthy, ethologists do not consider Shaker a behavioral gene.
由于颤动是不健康的，动物行为学家不认为颤动是一种行为基因。
2
Ethologists—specialists in animal behavior—are interested in evolution, so they define the term narrowly.
动物行为学专家对进化很感兴趣，所以他们对这个术语的定义很狭义。
3
Ethologists study the evolutionary basis and development of animals' innate behaviors, like a spider knowing how to make a web without learning from a parent.