自然淘汰[shizentouta] natural selection
人為淘汰[jinitouta] artificial selection (in biology)
人員淘汰[jinintouta] personnel reduction
淘汰[touta] weeding out
雌雄淘汰[shiyuutouta] sexual selection

整理淘汰[seiritouta] reorganize an enterprise and weed out redundant workers
血縁淘汰[ketsuentouta] kin selection
社会淘汰[shakaitouta] social selection
性淘汰[seitouta] sexual selection
淘汰作用[toutasayou] sifting out