“优生学”造句
优生学具有生物学上的意义.
Eugenics has a biological significance.
对 “ 积极 ”
优生学和 “ 消极 ”
优生学往往加以区分.
A distinction is often made between " positive " and " negative " eugenics.
消极
优生学的范例是试图破坏一种对人体有害的隐性基因.
An example of negative eugenics would be the attempt to eradicate a harmful recessive gene.