优生
eugenics; outstanding student
优胜劣败
see 優勝劣汰|优胜劣汰[you1 sheng4 lie4 tai4]
优胜劣汰
survival of the fittest (idiom)
有生以来
since birth; for one's whole life
有声有色
having sound and color (idiom); vivid; dazzling
有声读物
audiobook; recording of a person reading the text of a book
由盛转衰
from prosperity to decline; at its peak before the decline
没有生育能力
infertile; unable to have children