eugenics
noun [ U ] uk/juːˈdʒen.ɪks/ us/juːˈdʒen.ɪks/
优生学;人种改良学
the idea that it is possible to improve humans by allowing only some people to produce children
Eugenics was the central, and most controversial, part of his social philosophy. 优生学是他社会哲学体系的中心问题，也是最具争议性的问题。