In the early twentieth century, Malthusian ideas on population control were linked to theories of eugenics and social Darwinism.
在二十世纪早期，马尔萨斯对于人口控制的想法还与优生学和社会达尔文主义有关。
2
In fact, there is no scientific basis for theories pushing the genetic superiority of any one population over another.
实际上，那种认为某一种群比另一种群的基因更优越的理论是毫无科学根据的。
3
This paper demonstrates the necessity of strengthening the teaching and research of populationtheories in government officials' school, its content and methods.