1. The eugenicists believed in the improvement of the human race through selective breeding.
种族改良者相信通过选择性繁殖来改善人类种族。

2. Many eugenicists advocated for policies that would limit the reproduction of certain groups deemed to be undesirable.
许多种族改良者主张限制被认为不受欢迎的某些群体的繁殖。

3. The eugenicists promoted the idea that traits such as intelligence and physical strength could be passed down through generations.
种族改良者宣传了智力和体力等特征可以通过世代传承的观念。

4. Some eugenicists believed that sterilization of individuals deemed unfit for reproduction was necessary to prevent the spread of undesirable traits.
一些种族改良者认为对被认为不适合繁殖的个体进行绝育是必要的，以防止不良特征的传播。

5. The eugenicists faced criticism for their belief in the superiority of certain races and their attempts to control human reproduction.
种族改良者因为相信某些种族的优越性和试图控制人类繁殖而受到批评。

6. Despite the controversial nature of their ideas, many eugenicists played a significant role in shaping public policy and scientific research in the early 20th century.
尽管其观念具有争议性，但许多种族改良者在20世纪初对塑造公共政策和科学研究发挥了重要作用。